Question

hai friends I have started a 12.1
means 12 chapter triangle and there properties hope you help me ​

Answer 1

Answer:

60+40-180= ur answer

that is 80°

Answer 2

Answer:

Let us name the angles as 1,2 and 3

(1)=60°, (2)=40° (3)=?

By Angle Sum Property;

(1)+(2)+(3)=180°

60°+40°+(3)=180°

100°+(3)=180°

(3)=180°-100°=80°

Therefore, value of third angle is 80°.

Step-by-step explanation:

• Angle Sum Property of a Triangle says that sum of its interior angles is equal to 180°. Whether a triangle is an acute, obtuse, or a right triangle, the sum of the angles will always be 180°.

I hope it helps!