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Triangles: Calculate Unknown Angles

In this worksheet, students use their knowledge of the properties of a triangle to evaluate unknown angles.

'Triangles: Calculate Unknown Angles' worksheet

Key stage:  KS 2

Curriculum topic:  Maths and Numerical Reasoning

Curriculum subtopic:  2D Shapes: Circles, Angles and Bearings

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

In this worksheet, we will learn how to calculate the unknown angle in a triangle

 

Question:

Calculate the unknown angle in the triangle

Answer:    The angles in any triangle add to 180°

Angle = 180° - 54° - 64° = 62°

Calculate the unknown angle

Calculate the unknown angle

Calculate the unknown angle

Calculate the unknown angle

Calculate the unknown angle

Calculate the unknown angle

Calculate the unknown angle

  • Question 1

Calculate the unknown angle

CORRECT ANSWER
37
EDDIE SAYS
180 - 77 - 66 = 37
  • Question 2

Calculate the unknown angle

CORRECT ANSWER
32
EDDIE SAYS
180 - 69 - 79 = 32
  • Question 3

Calculate the unknown angle

CORRECT ANSWER
41
EDDIE SAYS
180 - 87 - 52 = 41
  • Question 4

Calculate the unknown angle

CORRECT ANSWER
39
EDDIE SAYS
180 - 74 - 67 = 39
  • Question 5

Calculate the unknown angle

CORRECT ANSWER
74
EDDIE SAYS
180 - 22 - 84 = 74
  • Question 6

Calculate the unknown angle

CORRECT ANSWER
64
EDDIE SAYS
180 - 90 - 26 = 64
  • Question 7

Calculate the unknown angle

CORRECT ANSWER
25
EDDIE SAYS
180 - 86 - 69 = 25
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