Question

if one of the angle formed by diagonals and adjacent side of a rhombus is 20°, all four angles of the rhombus are

Answer 1

Answer:

Step-by-step explanation:

Let ABCD is a rhombus in which AB=BC=CD=DA=diagonal CA.

In triangle BAC

BA=BC=CA , therefore

angle BAC=angle ABC= angle ACB =60°………(1)

Similarly in triangle DAC , DA=DC=CA , therefore

Angle DAC=angle ACD=angle ADC=60°……….(2)

From eqn. (1) and (2)

Angle A=angle BAC+angle DAC=60°+60°=120°

Angle B= angle ABC = 60°.

Angle C=angle ACB+angle ACD=60°+60°=120°

Angle D =angle ADC=60°. Answer.