INTRODUCTION 3 Min In the right-angled triangle ABC below, AB = BC The size of is … • The (MENTAL MATHS) Theorem of Pythagoras is 2. In the ABC, B = 70° and C = 30°. Calculate the size of A basically a formula to calculate unknown length of sides in triangles. LESSON PRESENTATION/ 10 Min In the previous lesson the class should have discovered KEYWORDS: DEVELOPMENT Pythagoras' Theorem for right-angled triangles. Triangle, right triangle, Pythagoras' Theorem says: hypotenuse, In any right-angled triangle, the square formed on the hypotenuse legs, will have the same area as the sum of the area of the two squares square root formed on the other two sides of the triangle. Therefore: (Hypotenuse)2 = (Side 1)2 + (Side 2)2 Present the following problem to the whole class and allow them five minutes to work in pairs to solve the problem.
INTRODUCTION (MENTAL MATHS) 3 Min In the right-angled triangle ABC below, AB = BC The size of is … 2. In the ABC, B = 70° and C = 30°. Calculate the size of A • The Theorem of Pythagoras is basically a formula to calculate unknown length of sides in triangles. LESSON PRESENTATION/ DEVELOPMENT 10 Min In the previous lesson the class should have discovered Pythagoras' Theorem for right-angled triangles. Pythagoras' Theorem says: In any right-angled triangle, the square formed on the hypotenuse will have the same area as the sum of the area of the two squares formed on the other two sides of the triangle. Therefore: (Hypotenuse)2 = (Side 1)2 + (Side 2)2 Present the following problem to the whole class and allow them five minutes to work in pairs to solve the problem. KEYWORDS: Triangle, right triangle, hypotenuse, legs, square root