Question

please solve the question number 20 complete solution send the solution pick thanks

Answer 1

All the sides of a rhombus are equal. So if one diagonal is equal to one side, we have 2 equilateral triangles with a common base. Hence all the angles of the 2 triangles are 60 degrees each. Thus one pair of opposite angles of the rhombus is 60 degrees and the other pair 120 degrees.

Answer 2

Heya User,

--> Concept :-> Rhombus is a ||gm with all sides equal...

-->As in the fig plus according to the Question :-> 
                  --> Let AB = AC
                  --> AB = BC = AC;

=> ΔABC is equilateral and hence, --> ∠A = ∠B = ∠C = 60°

Now,
--> Note :-> Opposite angles of a ||gm are supplementary, i.e., 
---> ∠A + ∠C = 180°
==> ∠C + 60° = 180°
==> ∠C = 120° <-- Ans..

Hence, the angles of the Rhombus are :-> 60°, 120°, 60°, 120° or vice versa