Area Formulas for Triangles

Area of a Triangle

Today's Goals

• Identify the base and height of the triangle

• Understand the basic formula to find the area of a triangle

• Apply these techniques in the context of solving real-world and mathematical problems.

• Create a triangle and find its area

Points to remember:

• Base is usually the bottom, but not always.

• The height of any object is how much it measures from its top to its bottom.

• Base and height meet at 90⁰ (90 degrees).

Multiple Choice

What is the height of the given triangle?

• 21 mm

• 66 mm

• 33 mm

Multiple Choice

Identify the height.

• 24 in

• 25 in

• 7 in

Area of a triangle =  $\frac{b\times h}{2}$  

Open Ended

Write the formula to find the area of a triangle.

Multiple Choice

Find the area of the triangle.

• 30 cm²

• 35 cm²

• 25 cm²

Multiple Choice

Salma bought the Almarai Cheese from LuLu Supermarket. She observes that the height of the triangle cheese is 6cm and base 4cm. Help Salma to find the area of the cheese.

• 13 cm²

• 12 cm²

• 10 cm²

Poll

How confident are you with today's lesson?