STD 8 C.R.EJuly 10, 2020GREDI YA 5… KISWAHILIJuly 14, 2020 0 STD 6 MATHEMATICS.. Welcome to your STD 6 MATHEMATICS.. Name Class Phone STD 6 MATHEMATICS LESSONTOPIC : ANGLESSUB-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 DOCALCULATE THE MISSING ANGLES.1. Calculate angle C. 80 100 70 None 2. Calculate angle A. 60 55 45 None 3. Calculate angle a° 70 50 60 None 4. If the angle at the aircraft is 45°, What is X°? 45 60 90 None 5. Calculate the missing angle. 54 45 62 None 6. Calculate angle x 40 30 80 None 7. Calculate angle ADB. 100 120 140 None 8. Triangle XYZ has Angle X and Z being the same with 45° each. What is the size of Angle Y? 100 80 90 None 9. Triangle QPR is an equilateral triangle. What is the size of angle P? 50 80 60 None 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what is the size of the smallest angle? 30 20 40 None Time's up Wanto Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ
