Question

In a rhombus ABCD, AC= 3 units and angle ABC= 120°. What is the area of ABCD?(in unit?)​

Answer 1

Answer:

C (3√3/2) is the correct answer.

Step-by-step explanation:

Firstly u must draw the fig.

Then, Concept to be applied are:-

C1: diagonals of rhombus bisects each other perpendicularly.

C2: Use basic trigonometry to find the half of the diagonal (Hint: Use tan theta to find perpendicular by base).

C3: Area of Rhombus is d1 × d2.

APPLYING ALL THE CONCEPTS

we will get the other diagonal = √3

then apply C3 and find area.