STD 6 MATHEMATICS..

STD 8 C.R.E
July 10, 2020
GREDI YA 5… KISWAHILI
July 14, 2020

STD 6 MATHEMATICS..

Welcome to your STD 6 MATHEMATICS..

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STD 6 MATHEMATICS LESSON

TOPIC : ANGLES

SUB-TOPIC : INTERIOR ANGLES OF A TRIANGLE.

  • Interior angles of a triangle add up to 180°
  • Always interior angles of a triangle are 3
  • Angles of a straight line add up to 180°
  • Angles of a circle Ο add up to 360°


 
Angle of this triangle add to 180° i.e  
60° + 60° + 60° = 180°. This triangle is called an equilateral triangle meaning all the sides and angles are equal.

Example of working:


WORK TO DO
CALCULATE THE MISSING ANGLES.

1. Calculate angle C.

2. Calculate angle A.

3. Calculate angle a°

4. If the angle at the aircraft is 45°, What is X°?

5. Calculate the missing angle.

6. Calculate angle x

7. Calculate angle ADB.

8. Triangle XYZ has Angle X and Z being the same with 45° each. What is the size of Angle Y?

9. Triangle QPR is an equilateral triangle. What is the size of angle P?

10. Calculate the angle of a triangle MNO whose largest angle is 100. If the second largest angle is half of the largest, what is the size of the smallest angle?

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