Angles in Triangles & Quadrilaterals (Ex. 1)

What's in this exercise

Answers are hidden — sign up to practise and check your work.

1. Question 1

   Multiple choice

   The angles in a triangle add up to?

2. Question 2

   Multiple choice

   The angles in a quadrilateral add up to?

3. Question 3

   Multiple choice

   A triangle has angles 60° and 80°. What is the third angle?

4. Question 4

   Sequence

   Third angle of isosceles triangles: 60+60+?=180→60°, 70+70+?=180→40°, 80+80+?=180→___°.

5. Question 5

   True or false

   The sum of angles in a triangle is 180°.

More exercises in this module

• Reflecting Shapes (Ex. 1)

• Reflecting Shapes (Ex. 2)

• Classifying 2D Shapes (Ex. 1)

• Coordinates in Four Quadrants (Ex. 1)

• Classifying 2D Shapes (Ex. 3)

• Translating Shapes (Ex. 3)