Test: Heron's Formula- 2 - Class 9 MCQ

If one side of a scalene △ is doubled then area would be increased by

An isosceles right triangle has area 8 cm². The length of its hypotenuse is :

If the area of an equilateral triangle is 36√3 cm², then the perimeter of the triangle is

Given the product of diagonals of a rhombus ABCD is 2500 cm², its area is

The area and length of one diagonal of a rhombus are given as 200 cm² and 10 cm respectively. The length of other diagonal is

In each side of a △ is halved then its perimeter will be decreased by

In ∆ABC, angle A = 30°, side 'b' = 4 units, side 'c' = 6 units. Find the area of ∆ABC,

The edges of a triangular board are 6 cm, 8 cm and 10 cm. The cost of painting it at the rate of 70 paise per cm² is

The area of a right angled triangle if the radius of its circumcircle is 3 cm and altitude drawn to the hypotenuse is 2 cm.

The area of one triangular part of a rhombus ABCD is given as 125 cm². The area of rhombus ABCD is

Length of perpendicular drawn on smallest side of scalene triangle is

The sides of a triangle are in ratio 3 : 4 : 5. If the perimeter of the triangle is 84 cm, then area of the triangle is :

The perimeter of a rhombus is 20 cm. If one of its diagonals is 6 cm, then its area is

Area of an isosceles triangle ABC with AB = a = AC and BC = b is

Each side of an equilateral triangle measures 10 cm. Then the area of the triangle is

Length of perpendicular drawn on longest side of a scale △ is

Each side of an equilateral triangle is 2x cm. If x√3 = √48, then area of the triangle is :

The area of a rhombus of 96 cm². If one of its diagonals is 16 cm, then the length of its side is

The area of quadrilateral ABCD whose diagonals are perpendicular and of lengths 12 cm, 8 cm is

The area of a parallelogram whose base is 32 m and the corresponding altitude is 6 m is

Semiperimeter of scalene triangle of side k, 2k and 3k is

The sides of a triangle are x, y and z. If x + y = 7 m, y + z = 9 m, and z + x = 8 m, then area of the triangle is :