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
Heron's formula is
1/2 bh
4/3 x2
Triangles with the same base and between the same parallels are of
Equal area
Equal perimeter
Both 1 & 2
None of these
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
Calculate the area of an equilateral triangle whose height is 20cm.
230.9cm2
230cm2
119.5cm2
210.9cm2
The area of an equilateral triangle is numerically equal to its perimeter . Find the length of its side.
√3 units
2√3 units
3√3 unit
4√3 unit
Heron's formula is used to find the area of
Rectangle
Parallelogram
Trapezium
Triangle
If one side of an equilateral triangle is 4cm. Then its area =
9√3 cm2
8√3 cm2
4√3 cm2
√3 cm2
Δ ABC shown below is inscribed inside a square of side 20cm. Find the area of the triangle
50cm2
100cm2
200cm2
225cm2
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
