Q3 of 97 Page 205

In a right ∆ABC, ∠B=90°. Find the longest side.

It is given in the question that,

In right triangle ABC,

∠B = 90^o

So, ∠A + ∠C = 90^o

∴ ∠A, ∠C < ∠B

Hence, the side opposite to ∠B is longest

Thus, AC is the longest side

In an equilateral ∆ABC, find ∠A.

In a ∆ABC, if AB=AC and ∠B=65°, find ∠A.

In a ∆ABC, ∠B > ∠C. Which of AC and AB is longer?

Can we construct a ∆ABC in which AB=5cm, BC=4cm and AC=9cm? Why?