In an isosceles triangle ABC if AC = BC and AB2 = 2AC2 , then =

Q42 of 168 Page 4

In an isosceles triangle ABC if AC = BC and AB² = 2AC² , then =

Given in isosceles ΔABC, AC = BC and AB² = 2AC²

In isosceles ΔABC,

AC = BC, so ∠B = ∠A [Equal sides have equal angles opposite to them]

⇒ AB² = 2AC²

⇒ AB² = AC² + AC²

⇒ AB² = AC² + BC²

∴ ΔABC is right angle triangle with ∠C = 90°

In an equilateral triangle ABC if , then

If such that AB = 9.1 cm and DE = 6.5 cm. If the perimeter of is 25 cm, then the perimeter of is

is an isosceles triangle in which = 90° . If AC = 6 cm, then AB=

If in two triangles ABC and DEF, , , then which of the following not true?