Heron's formula is
1/2 bh
4/3 x2
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
Triangles with the same base and between the same parallels are of
Equal area
Equal perimeter
Both 1 & 2
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
Area of an equilateral triangle with side x is
1/2 x2
x2
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
Heron's formula is used to find the area of
Rectangle
Parallelogram
Trapezium
Triangle
Δ ABC shown below is inscribed inside a square of side 20cm. Find the area of the triangle
50cm2
100cm2
200cm2
225cm2
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 area of right angled triangle is 20cm2 and one of the sides containing the right triangle is 4 cm. Then the altitude on the hypotenuse is
8cm
10cm
