This geometry figure consists of 2 rays that share a common endpoint.
What is an angle?
These congruent angles are opposite each other when 2 lines cross.
What are vertical angles?
This quadrilateral has 4 90 degree angles (but not necessarily 4 congruent sides)
What is a rectangle?
Solve for x.
7x - 4x +5 = 2
x = -1
This type of triangle 1 angle equal to 90°.
What is a right triangle?
This type of triangle has 1 angle greater than 90 degrees.
What is an obtuse triangle?
When 2 angles share a side, we call them this.
What are adjacent angles?
This quadrilateral has 4 congruent sides (but not necessarily 4 90 degree angles)
What is a rhombus?
Solve for x.
3x + 24 + x - 12 = 2x +10
x = -1
This number is the sum of the 3 interior angles of a triangle.
What is a 180°?
This type of triangle has 3 sides of different lengths.
What is a scalene triangle?
Find the measure of angle a.
What is 60°?
A quadrilateral with 2 sets of parallel sides.
What is a parallelogram?
Solve for x.

x = 66
The specific classification for a triangle with angle measures 65°, 65°, and 50°.
What is an acute isosceles?
This is the name of a triangle with at least 2 equal sides (and 2 equal angles).
What is an isosceles?
Find the measure of ∠D. 
What is 60°?
A quadrilateral with exactly 1 set of parallel sides.
What is a trapezoid?
Solve for x.![]()
x = 5
All interior angles of an equilateral triangle have this measure.
What is 60°?
This quadrilateral has 2 pairs of congruent consecutive sides.
What is a kite?
Find the measure of angle C.

What is 72°?
This is the sum of the interior angles of a quadrilateral.
What is 360°?
Solve for x.![]()
x = 9
If a right triangle is isosceles, these are the measures of its 3 angles
What are 45°, 45°, and 90°?