Multiple Choice QuestionsThe area of the parallelogram whose length is 30 cm, width is 20 cm and one diagonal is 40 cm is
On increasing each side of a square by 50%, the ratio of the area of new square formed and the given square will be
9 : 5
9 : 3.5
9 : 7
9 : 7
The area of circle is 
 square cm. The length of its longest chord (in cm) is
36
28
38
38
The area of a rhombus is 256 square cm and one of its diagonals is twice the other in length. Then length of its largest diagonal is
32 cm
16 cm
48 cm
48 cm
If the side of a square is 
 and its diagonal is 
 then the length of the side of the square would be
1 unit
1 unit
For an equilateral triangle, the ratio of the in-radius and the ex-radius is
1 : 2
1 : 3
1 : 3
The circumference of a triangle is 24 cm and the circumference of its in-circle is 44 cm. Then the area of the triangle is (taking 
)
56 square cm.
84 square cm.
48 square cm
48 square cm
If a and b are the lengths of the sides of a right triangle whose hypotenuse is 10 and whose area is 20, then the value of (a + b)2 is
140
180
120
120
B.
180
h2 = a2 + b2 = 102 = 100
Area of Δ ABC = 20 (given)
If the length of each of two equal sides of an isosceles triangle is 10 cm and the adjacent angle is 45°, then the area of the triangle is
One of the angles of a right-angled is 15°, and the hypotenuse is 1 metre. The area of the triangle (in square cm) is
1220
1200
1250
1250
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