Properties of TriangleHard

Question

In ᐃABC, if (a + b + c)(a − b + c) = 3ac, then -

Options

A.∠B = 60^o

B.∠B = 30^o

C.∠C = 60^o

D.∠A + ∠C = 90^o

Solution

-

Create a free account to view solution

View Solution Free

Topic: Properties of Triangle·Practice all Properties of Triangle questions

More Properties of Triangle Questions

Let ᐃPQR be a triangle. Let and . If || = 12, ||= 4√3 and . = 24 then which of the following is (are) true ?...The number of points, having both co-ordinates as integers, that lie in the interior of the triangle with vertices (0, 0...r r1 + r2 r3 =...Two sides of a triangle are given by the roots of the equation x2 − 2√3 x + 2 = 0. The angle between the sid...In ᐃABC, if 2s = a + b + c, then the value of =...