5 Questions
What is the sum of the interior angles of a triangle?
180°
If a bakery sells 250 loaves of bread per day, how many loaves will it sell in 5 days?
1250 loaves
What is the value of x in the equation 2x + 5 = 11?
3
If a book costs $15, and a 10% discount is applied, how much will the book cost after the discount?
$13.50
What is the perimeter of a rectangle with a length of 6 cm and a width of 4 cm?
16 cm
Study Notes
Geometry
- The sum of the interior angles of a triangle is 180 degrees.
Real-World Applications
- If a bakery sells 250 loaves of bread per day, it will sell 250 x 5 = 1250 loaves in 5 days.
Algebra
- To solve the equation 2x + 5 = 11, subtract 5 from both sides to get 2x = 6, then divide both sides by 2 to get x = 3.
Discounts
- If a book costs $15, and a 10% discount is applied, the discount is $15 x 0.10 = $1.50, so the book will cost $15 - $1.50 = $13.50 after the discount.
Geometry
- The perimeter of a rectangle with a length of 6 cm and a width of 4 cm is 2(l + w) = 2(6 + 4) = 2 x 10 = 20 cm.
Practice your math skills with these problems from 2nd secundaria, covering topics such as geometry, algebra, and percentages.
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