| A | B |
|---|
| In ΔXYZ, if angle Y = 76° and angle X = 84°, find the measure of angle Z. | 20° |
| In ΔDEF, if angle F = 57° and angle E = 55°, find the measure of angle D. | 68° |
| In ΔMNO, if angle M = 52° and angle N = 38°, find the measure of angle O. | 90° |
| In ΔABC, if angle A = 31° and angle B = 41°, classify the Δ by its sides and angles. | Scalene, obtuse |
| A triangle with no congruent sides. | Scalene Δ |
| In ΔABC, if angle A = 30°, and angle B = 120°, classify the triangle by its sides and angles. | Isosceles, obtuse |
| In ΔRST, if angle T = 55°, and angle R = 70°, find the measure of angle S. | 55° |
| In ΔXYZ, if angle X = 50° and angle Y = 40°, classify the triangle by its sides and angles. | Scalene, right |
| A triangle with at least 2 congruent sides. | Isosceles Δ |
| A triangle with 3 congruent sides. | Equilateral Δ |
| A triangle with 3 congruent angles. | Equiangular Δ |
| If ΔLMN is an equilateral triangle, the measure of angle M = ___. | 60° |
| A triangle with 3 angles whose measures are less than 90°. | Acute Δ |
| A triangle with one angle whose measure is more than 90°. | Obtuse Δ |
| A triangle with one angle whose measure is 90°. | Right Δ |
| If ΔGOH is a right, isosceles Δ, what are the measures of its angles? | 45°, 45°, 90° |
| If a triangle is isosceles, then it must be an equilateral triangle. | False |
| If a triangle is equiangular, then the triangle is isosceles. | True |
| The sum of the 3 angles of a triangle is ___. | 180° |
| The sum of any 2 sides of a triangle must be ___. | greater than the length of the 3rd side. |
| A right triangle is ___ an isosceles triange. | Sometimes |
| An equilateral triangle is ___ an isosceles triangle. | Always |
| An isosceles triangle is ___ an equiangular triangle. | Sometimes |
| An obtuse triangle is ___ an equilateral triangle. | Never |
| An acute triangle is ___ an equiangular triangle. | Sometimes |
