Question

How do I prove that the sum of the angles in a triangle is 180 degrees? And also how do I start question 7 to prove that d= a+b+c ?

Answer 1

Answer:

d equal to the some

A coin kept inside a water when viewed from air in vertical direction appears to be raised by 2.0mm The depth of coin in water is?

Answer 2

Answer:

Thanks for the question