P5 Math · Chapter 16brightbit.net/worksheets

Geometry — Angles in Triangles & Quadrilaterals

Name: ______________________Class: ________Date: ____________Score: ____ / 10

1.
The angles of a triangle are 40°, 75° and x°. Find x.
(a) 55°(b) 60°(c) 65°(d) 70°
2.
An isosceles triangle has a base angle of 50°. What is the apex angle?
Answer: ____________________________________
3.
Find the missing angle in a quadrilateral with angles 90°, 110°, 85° and x°.
(a) 65°(b) 70°(c) 75°(d) 85°
4.
A parallelogram has one angle of 70°. What are the other three angles?
Answer: ____________________________________
5.
In triangle PQR, angle P = 55° and angle Q = angle R. What is angle Q?
(a) 55°(b) 60°(c) 62.5°(d) 65°
6.
A straight line is intersected by two lines forming angles of 35° and x°. If the three angles form a straight angle (180°), find the third angle.
Answer: ____________________________________
7.
A rhombus has one angle of 120°. What is the size of each of the other angles?
(a) 60°, 60°, 120°(b) 60°, 120°, 60°(c) All 90°(d) 30°, 120°, 90°
8.
In a triangle, one exterior angle is 115°. The two non-adjacent interior angles are equal. Find each interior angle.
Answer: ____________________________________
9.
Two angles of a quadrilateral are each 95°. The other two angles are equal. What is each of the other two angles?
(a) 75°(b) 80°(c) 85°(d) 90°
10.
An equilateral triangle is placed on top of a square. What is the angle at the top of the combined shape (the apex of the triangle)?
Answer: ____________________________________

Answer key — P5 Math: Geometry — Angles in Triangles & Quadrilaterals

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