If the sides of a triangle are 3, 5, and 6, prove that the triangle is obtuse - angled triangle and find the obtuse angle.

If the sides of a triangle are 3 cm, 4 cm and 6 cm long, determine whether the triangle is right-angled triangle.

If the sides of a triangle are 3 cm, 4 cm and 6 cm long, determine whether the triangle is a right-angle triangle.

If the lengths of the sides of a triangle are 3, 5, 7 , then its largest angle of the triangle is

The sides of a triangle are in a ratio of 4:5:6. the smallest angle is

Find the ara of the given obtuse-angled triangle ABC.

By giving a counter example, show that the following statements are not true.(i) p: If all the angles of a triangle are equal, then the triangle is an obtuse angled triangle.(ii) q: The equation x^2-1=0 does not have a root lying between 0

In any triangle ABC, the sides are 6 cm, 10 cm and 14 cm. Then the triangle is obtuse angled with the obtuse angle equal to

Which of the following statements are true (T) and which are false (F): Sum of the three angles of a triangle is 180^0 A triangle can have two right angles. All the angles of a triangle can be less than 60^0 All the angles of a triangle can be greater than 60^0 All the angles of a triangle can be equal to 60^0 A triangle can have two obtuse angles. A triangle can have at most one obtuse angles. In one angle of a triangle is obtuse, then it cannot be a right angled triangle. An exterior angle of a triangle is less than either of its interior opposite angles. An exterior angle of a triangle is equal to the sum of the two interior opposite angles. An exterior angle of a triangle is greater than the opposite interior angles

In DeltaABC , The sines of the angles of a triangle are in the ratio of 4 : 5 : 6, prove that the cosines of the angles are 12 : 9 : 2.

If one angle of a triangle is greater than the sum of the other two, show that the triangle is obtuse angled.