construction where two angles and the side between them is known. Draw the given side of the triangle using a ruler. Use a protractor to measure the angle from the left-hand endpoint of the given ...

and measurement. What it means is that in a right triangle (where one angle equals 90°), the sum of the squares of two sides equals the square of the hypotenuse (the longest side).

Pythagoras' theorem describes the relationship between the three sides of a right-angled ... one larger triangle with ...