Question

2. PQR is an equilateral triangle with side 8
cm. On one of its sides PR, a right angled
triangle PRS is drawn with ZPRS = 90° and
RS 12 cm. Find the area of PQRS.
find equilateral triangle by Pythagoras theorem.​

Answer 1

Answer:

Step-by-step explanation:

The fig. will be like this.

Firstly, we will find the area of ∆pqr

area of equi. trialngle= √3/4×a×a

=√3/4×8×8

= 27.71 sq. cm

Now we will find the area of ∆PRS= 1/2 ×b×h

=1/2×12×8

=48 sq. cm

Now add both the Areas= 48+27.71= 75.71 sq. cm