English Medium इयत्ता ९ - CBSE Question Bank Solutions

Let Δ be the area of a triangle. Find the area of a triangle whose each side is twice the side of the given triangle.

If each side of a equilateral triangle is tripled then what is the percentage increase in the area of the triangle?

Mark the correct alternative in each of the following:
The sides of a triangle are 16 cm, 30 cm, 34 cm. Its area is

The base of an isosceles right triangle is 30 cm. Its area is

The sides of a triangle are 7 cm, 9 cm and 14 cm. Its area is

The sides of a triangular field are 325 m, 300 m and 125 m. Its area is

The sides of a triangle are 50 cm, 78 cm and 112 cm. The smallest altitude is

The sides of a triangle are 11 m, 60 m and 61 m. The altitude to the smallest side is

The sides of a triangle are 11 cm, 15 cm and 16 cm. The altitude to the largest side is

The base and hypotenuse of a right triangle are respectively 5 cm and 13 cm long. Its area is ______.

If the area of an isosceles right triangle is 8 cm², what is the perimeter of the triangle?

The lengths of the sides of Δ ABC are consecutive integers. It Δ ABC has the same perimeter as an equilateral triangle with a side of length 9 cm, what is the length of the shortest side of ΔABC?

In the given figure, the ratio AD to DC is 3 to 2. If the area of Δ ABC is 40 cm², what is the area of Δ BDC?

If the length of a median of an equilateral triangle is x cm, then its area is

If every side of a triangle is doubled, then increase in the area of the triangle is

A square and an equilateral triangle have equal perimeters. If the diagonal of the square is \[12\sqrt{2}\]  cm, then area of the triangle is

A chord of a circle is equal to the radius of the circle. Find the angle subtended by the chord at a point on the minor arc and also at a point on the major arc.

Which of the following statements are true (T) and which are false (F):

If any two sides of a right triangle are respectively equal to two sides of other right triangle, then the two triangles are congruent.