Right angles are an angle of 90°, it’s placed in the corner of a square. It can also be formed by dividing a circle into quarters. A right angle is 1 quarter of a full revolution. This leads us onto the Pythagoras Theorem which is based on right angles. The rules of Pythagoras is that the hypotenuse which is the diagonal side of the triangle must equal the two other sides which are a right angle called legs.
In this case ‘a’ and ‘b’ are the sides of the right angle and ‘c’ is the hypotenuse which is the opposite side to the right angle. It is the longest side of all three sides.
The coloured picture to the left shows 32+42=52. 32 is the blue square that has 9 smaller squares inside. its called 32 because 3 times 3 equals 9. 42 is the green square that has 16 smaller squares inside. It's called 42 because 4 times 4 equals 16. 32 and 42 equal 25, that's where the red square comes in. 52 is the red square that has 25 smaller squares inside. It's called 52 because 5 times 5 equals 25. 32+42=52 9+16=25 25=25 |
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