Area of Triangles

Area of Triangles

How can you use the formula for the area of a parallelogram to find the area of a triangle?

The diagonal of a parallelogram divides it into two identical triangles.

​

The area of one triangle must be half the area of a parallelogram that has the same base and height.

​

Multiple Choice

What is the area of this triangle?

• 49 square feet

• 600 square feet

• 100 square feet

• 300 square feet

Multiple Choice

What is the best estimate of the area of a triangle that has a base of 23.62 cm and a height of 8.33 cm?

• 200 square cm

• 160 square cm

• 100 square cm

• 50 square cm

Multiple Choice

What is the area of this triangle?

• 216 square cm

• 200 square cm

• 108 square cm

• 180 square cm

Fill in the Blank

What is the area of a triangle with b = 20 in and height = 3 in?

Fill in the Blank

Poll

How do you feel about finding the area of a triangle?

• Great!

• So-So

• Confused

Drag and Drop

Um determinado triângulo possui altura de 5 cm e sua base mede 15 cm. Qual a área desse triângulo?​

Placeholder

Drag these tiles and drop them in the correct blank above

37,5 cm²

75 cm²

38 cm²

37 cm²