Gr12 Mathematics: Ch 7.3 Triangles
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Questions and Answers

What is the conclusion of triangles with the same height?

  • Triangles with equal heights have areas proportional to their heights.
  • Triangles with equal heights have bases proportional to their areas.
  • Triangles with equal heights have areas equal to each other.
  • Triangles with equal heights have areas proportional to their bases. (correct)

What is the formula to find the area of triangle ABC?

  • Area = BC * h
  • Area = (1/3) * BC * h
  • Area = BC / h
  • Area = (1/2) * BC * h (correct)

What can be concluded about two triangles on the same base and equal in area?

  • The triangles are congruent.
  • The triangles lie between parallel lines. (correct)
  • The triangles have equal heights.
  • The triangles have equal perimeters.

What is the statement of the Proportion Theorem?

<p>A line drawn parallel to one side of a triangle divides the other two sides of the triangle in the same proportion. (D)</p> Signup and view all the answers

What is the formula of the Proportion Theorem?

<p>AD/DB = AE/EC (C)</p> Signup and view all the answers

What is the statement of the Mid-point Theorem?

<p>The line joining the midpoints of two sides of a triangle is parallel to the third side and equal to half the length of the third side. (D)</p> Signup and view all the answers

What can be concluded about triangles with the same base and between the same parallel lines?

<p>The triangles have equal areas. (C)</p> Signup and view all the answers

What is the purpose of drawing perpendiculars in the proof of the Proportion Theorem?

<p>To show that the line divides the sides proportionally. (D)</p> Signup and view all the answers

What is the condition for the Mid-point Theorem to be applied?

<p>If the line joining the midpoints of two sides of a triangle is parallel to the third side (A)</p> Signup and view all the answers

What is the formula to find the area of a triangle?

<p>Area = (1/2) × base × height (C)</p> Signup and view all the answers

What can be said about the areas of two triangles with equal heights?

<p>They are proportional to their bases (B)</p> Signup and view all the answers

What is the condition for two triangles to be similar?

<p>If they are equiangular (A)</p> Signup and view all the answers

What is the Proportion Theorem?

<p>A line drawn parallel to one side of a triangle divides the other two sides proportionally (B)</p> Signup and view all the answers

What is the converse of the Mid-point Theorem?

<p>The line drawn from the midpoint of one side of a triangle parallel to another side bisects the third side of the triangle (C)</p> Signup and view all the answers

If DE is parallel to BC and AD = 4, what is the length of DB?

<p>6 (D)</p> Signup and view all the answers

In a triangle, if the line joining the midpoints of two sides is drawn, what can be said about the line?

<p>It is parallel to the third side and half its length. (A)</p> Signup and view all the answers

What is the ratio of the areas of two triangles with equal heights?

<p>Directly proportional to the bases (D)</p> Signup and view all the answers

If two triangles are equiangular, what can be said about the corresponding sides?

<p>They are proportional (C)</p> Signup and view all the answers

What is the converse of the Mid-point Theorem?

<p>The line drawn from the midpoint of one side of a triangle bisects the third side. (C)</p> Signup and view all the answers

If two triangles have proportional corresponding sides, what can be said about the triangles?

<p>They are similar (C)</p> Signup and view all the answers

What can be said about the heights of two triangles on the same base and equal in area?

<p>They are equal. (C)</p> Signup and view all the answers

If a line is drawn parallel to one side of a triangle, what can be said about the other two sides?

<p>They are divided in the same ratio. (B)</p> Signup and view all the answers

What is the ratio of the areas of two triangles with equal heights and bases in the ratio of 2:3?

<p>2:3 (D)</p> Signup and view all the answers

If two triangles have areas in the ratio of 2:3 and their heights are equal, what can be said about their bases?

<p>Their bases are in the ratio of 2:3. (D)</p> Signup and view all the answers

What is the length of the line joining the midpoints of two sides of a triangle?

<p>Half the length of the third side. (D)</p> Signup and view all the answers

What can be said about the areas of two triangles with the same base and between the same parallel lines?

<p>They are equal. (B)</p> Signup and view all the answers

If two triangles have equal areas and their bases are in the ratio of 2:3, what can be said about their heights?

<p>Their heights are in the ratio of 3:2. (D)</p> Signup and view all the answers

What is the purpose of drawing perpendiculars in the proof of the Proportion Theorem?

<p>To show that the line divides the sides proportionally. (B)</p> Signup and view all the answers

What can be concluded about two triangles with proportional areas and equal heights?

<p>They have proportional bases. (C)</p> Signup and view all the answers

In the proof of the Proportion Theorem, why are perpendiculars drawn from E to AD and from D to AE?

<p>To show that the line divides the sides proportionally. (B)</p> Signup and view all the answers

If two triangles have equal areas and their bases are in the ratio of 2:3, what can be said about their heights?

<p>Their heights are in the ratio of 3:2. (D)</p> Signup and view all the answers

What is the condition for two triangles to have areas in a certain ratio?

<p>They should have proportional corresponding sides. (A)</p> Signup and view all the answers

What can be concluded about a line drawn parallel to one side of a triangle?

<p>It divides the other two sides in the same proportion. (B)</p> Signup and view all the answers

If two triangles have proportional corresponding sides, what can be said about their areas?

<p>They are in a certain ratio. (B)</p> Signup and view all the answers

What is the ratio of the areas of two triangles with equal heights and bases in the ratio of 2:3?

<p>2:3 (D)</p> Signup and view all the answers

What can be said about the heights of two triangles on the same base and equal in area?

<p>They are equal. (C)</p> Signup and view all the answers

If two triangles have proportional corresponding sides and one of them has a side of length 6 units, what can be said about the corresponding side in the other triangle?

<p>It is greater than 6 units (B)</p> Signup and view all the answers

If a line is drawn parallel to one side of a triangle and intersects the other two sides, what can be said about the line segments formed?

<p>They are proportional to the original sides (C)</p> Signup and view all the answers

If two triangles have equal areas and their heights are in the ratio of 2:3, what can be said about their bases?

<p>They are in the ratio of 3:2 (D)</p> Signup and view all the answers

If a line is drawn through the midpoint of one side of a triangle, what can be said about the line and the third side of the triangle?

<p>The line is parallel to the third side and half its length (A)</p> Signup and view all the answers

If two triangles have bases in the ratio of 2:3 and their areas are equal, what can be said about their heights?

<p>They are equal (A)</p> Signup and view all the answers

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