In Heron's formula, s represents
Perimeter of the triangle
Semi-perimeter of the triangle
Hypotenuse
None of these
In a right triangle with sides x and y, hypotenuse z, the altitude drawn on the hypotenuse is a, then
xy = a2
1/x + 1/y = 1/a
x2 + y2 = 2a2
If the sides of a triangle are doubled, then its area
Remains the same
Becomes doubled
Becomes three times
Becomes four times
The sides of an equilateral triangle are (2a - b) cm, (a + 3b)cm and (2a - 2b + 1)cm, then the perimeter of the triangle is
3cm
12 cm
15 cm
21 cm
The sides of a triangle containing the right angle are 5x cm and (3x - 1) cm. If the area of the triangle is 60cm2, calculate the length of the sides
10cm, 8cm
15cm, 8cm
15cm, 10cm
12cm, 8cm
The area of triangle whose sides are 3cm, 4cm and 5cm is
5 cm2
6 cm2
7 cm2
8 cm2
The base of the traingle is 15dm and its height is 12dm. The height of another triangle of double the area and the base of which is 20 dm is
9 dm
18 dm
8 dm
12.5dm
Triangles with the same base and between the same parallels are of
Equal area
Equal perimeter
Both 1 & 2
Heron's formula is used to find the area of
Rectangle
Parallelogram
Trapezium
Triangle
Area of an equilateral triangle with side x is
1/2 x2
x2
4/3 x2
