If the area of ΔPQR above is 12√3 cm2, find the value of q?
-
6 cm
- 7 cm
- 8 cm
- 5 cm
The correct answer is: A
Explanation
Area of a triangle = 1/2 ab Sinθ
12√3 = 1/2 x 8 x q sin 60
12√3 = 4 x q x √3/2
12√3 = 2q√3
| q = | 12√3 |
| 2√3 |
q = 6
There is an explanation video available .