The height of an equilateral triangle of side is 10 3&rad...
The height of an equilateral triangle of side is 10 3√ cm. calculate its perimeter.
20cm
60cm
40cm
30cm
Correct answer is B
Height of an equilateral triangle, h = a√32, where a is the side of the equilateral triangle.
10√3 = a√32
cross multiply--> 2 * 10√3 = a√3
√3 strikes √3 on both sides
20 = a
The perimeter of an equilateral triangle is: P = 3a
P = 3 * 20 = 60cm
P = 30√3
How many students scored less than 7 marks? ...
What is the mean deviation of x, 2x, x+1 and 3x. If their mean is 2? ...
From the cyclic quadrilateral MNOP above, find the value of x....
If θ = 32 and θ is less than 90o, calculate tan \(\frac{(90 - \theta)...
The equation of a line is given as 3 x - 5y = 7. Find its gradient (slope)...