Question
Sides of a triangle are 6,
10 and x for what value of x is the area of the D the maximum?
A. 8
cms
B. 9
cms
C. 12
cms
D. None
of these
Correct Answer: D
Explanatory Answer
Side
of a triangle are. 6, 10, x.
Area
= 1/2 x 6 x 10 sin ÐBAC.
Area
is maximum, when ÐBAC
= 90o
x = sqrt(100 + 36) = sqrt(136)
There
is a more algebraic method using hero’s formula. Try that also.
Answer
Choice (D)