Wedn esday 24 6 2020 WALT Compare similarities

Wedn esday 24. 6. 2020 WALT Compare similarities and differences of triangles WILF: • I know what a right angle is • I can identify if an angle is less or more than 90 degrees • I can explain acute and obtuse Key vocabulary: angle, acute, obtuse, right angle, triangle, isosceles, equilateral, scalene

Triangles Diving Which triangle is equilateral? Isosceles? Scalene? Right-angled?

Triangles Diving Which triangle is equilateral? Isosceles? Scalene? Right-angled? Equilateral Right-angled Isosceles Scalene

Triangles Deeper What do these triangles have in common? What is different about them? They are both right-angled triangles. One is also an isosceles triangle.

Triangles Deeper True or false? A scalene triangle can have two equal sides. The right angle in a right-angled triangle can only be on the base of the triangle. An equilateral triangle has all angles equal. A scalene triangle never has equal angles.

Triangles Deepest How could I draw two more sides to make a scalene triangle? If this line was 6 cm long and I used it as one of my equal length sides in an isosceles triangle, can you work out the length of one other side? How? 6 cm! Isosceles triangles have two equal length sides.

Triangles Deepest If I draw an isosceles triangle with sides that are whole numbers and add up to 14 cm, it has to have these measurements: 6 cm Is this correct? What other isosceles triangles could have sides which equal 14 cm? 2 cm 5 cm 4 cm 4 cm 6 cm

Here is a square. Inside the square is an equilateral triangle. The perimeter of the square is 60 cm. Find the perimeter of the triangle. 8 © White Rose Maths 2019

EXT. To work this out, first we need to find the length of one side of the square. The perimeter of the square is 60 cm so one side = 60 ÷ 4 = 15 cm. The triangle is equilateral with one side 15 m. So the perimeter of the triangle must be 15 x 3 = 45 cm. 9