Find the area of a right-angled \(\Delta \)ABC, right angled at B in which AB = 24 metre and BC = 10 metre.

4

(a)

lf the area of an equilateral triangle is \(81\sqrt { 3 } \)cm², find its perimeter.

4

(a)

An isosceles triangle has perimeter 30 m and each of the equal sides is 12 cm.Find area of the triangle.

4

(a)

Sides of a triangle are in the ratio 13:14:15 and its perimeter is 84 cm.Find its area.

4

(a)

The perimeter of a triangle field is 300 cm and its sides are in the ratio 5:12:13.Find the length of the perpendicular from the opposite vertex to the side whose length is 130 cm.

4

(a)

Black and white coloured triangular sheets are used to make a toy as shown in figure. Find the total area of black and white colour sheets used for making the toy.
 

4

(a)

The cross- section of a canal is in the shape of a trapezium.If the canal is 12 m wide at the top and 8 m wide at the bottom and the area of its cross-section is 84 m², determine its depth.

4

(a)

Find the area of a rhombus whose perimeter is 200 m and one of the diagonals is 80 m.

4

(a)

Find the area of a quadrilateral ABCD whose sides AB = 13 cm, BC = 12 cm, CD = 9 cm, DA = 14 cm and diagonal BD = 15 cm.

4

(a)

The sides of a triangular field are 51 m, 37 m, and 20 m.Find the number of rose beds that can be prepared in the field if each rose bed occupies a space of 6 sq.cm.

4

(a)