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A right-angled triangle has a base of 5 cm, a height of 12 cm. Find the length of the hypotenuse.
Draw the triangle.Let the base = a, height = b and hypotenuse = ca = 5, b = 12, c = ?Using Pythagoras theorem, a2 + b2 = c2so, 52 + 122 = c2
ABCD is a regular paralleogram, A=(2,1) B=(7,2) and C=(4,6), work out the gradient of the line CD and then work out the area of ABCD.
As its a parallelogram the gradient of CD will be the same as the gradient of AB so you just need to work out the gradient of AB using the formula (y2-y1)/(x2-x1
