Geometry Vocabulary PDF

## 1-2 Geometry Basics Vocab ### Congruent Segments **Definition:** Segments with the same length or measure. **Examples:** * 5 cm * 4m * 4m * 5 cm **Non-Examples:** * 8 m * 9 mm * 5 mm * 3 m ### Congruent Angles **Definition:** Angles with the same measure. **Examples:** * These angles a...

## 1-2 Geometry Basics Vocab ### Congruent Segments **Definition:** Segments with the same length or measure. **Examples:** * 5 cm * 4m * 4m * 5 cm **Non-Examples:** * 8 m * 9 mm * 5 mm * 3 m ### Congruent Angles **Definition:** Angles with the same measure. **Examples:** * These angles are congruent. **Non-Examples:** * These angles are not congruent. ### Acute Angle **Definition:** $0° < x < 90°$ **Examples:** * 33° * 89° * 58° **Non-Examples:** * 91° * 100° ### Right Angle **Definition:** $= 90°$ **Examples:** * 90° * 90° **Non-Examples:** * 30° * 80° * 150° ### Obtuse Angle **Definition:** $90°<x<180°$ **Examples:** * 101° * 91° * 129° **Non-Examples:** * 38° * 89° ### Straight Angle **Definition:** $= 180°$ **Examples:** **Non-Examples:** * make a straight line ### Adjacent Angles **Definition:** Angles who share a common vertex and side. **Examples:** * ∠ 1 and ∠ 2 are adjacent angles. **Non-Examples:** * ∠ 1 and ∠ 2 are not adjacent angles. * ∠ 1 and ∠ ABC are not adjacent angles. ### Segment Addition Postulate **Given:** A C B **If 3 points A, B and C are collinear and C is between A and B then...** $AC + CB = AB$ ### Angle Addition Postulate **Given:** * A D B C **If D is a point in the interior of $ABC$ then...** $m∠ABD + m∠DBC = m∠ABC$ ### Distance Formula **Given:** $(x_1, y_1)$ and $(x_2, y_2)$ $\sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}$