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
If the sides of a triangle are doubled, then its area
Remains the same
Becomes doubled
Becomes three times
Becomes four times
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
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
Suppose a triangle with area 28 has a base 7x and a height of 4x. The base and height are respectively
7, 4
4, 7
None of these
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
In Heron's formula, s represents
Perimeter of the triangle
Semi-perimeter of the triangle
Hypotenuse
Triangles with the same base and between the same parallels are of
Equal area
Equal perimeter
Both 1 & 2
A triangle has a height of 6cm and its area is 30cm2, what is the length of its base
12cm
13cm
15cm
