Formula for the Area of a Triangle

Formula for the Area of a Triangle

Multiple Select

Select all the statements that are true about bases and heights in a triangle.

• Any side of a triangle can be a base.

• There is only one possible height.

• A height that corresponds to a base must be drawn at a right angle to the base.

Draw

For each triangle, a base has been labeled, and a dashed line indicates a possible height.

Circle the triangles that correctly labeled base-height pair.

Labelling

Label the base, height, and area of the triangles.

Drag labels to their correct position on the image

11

10

7

15

35

33

10

3

6

Math Response

What is a formula that can be used to find the area of ANY triangle?

Type answer here

Correct Answer: a=b\times h\div2

Deg^°

Rad

Draw

Step 1: Draw a circle around the base.

Step 2: Draw a rectangle around the height.

Math Response

Write the equation to find the area of this triangle.

Type answer here

Correct Answer: 5\times6\div2=15

Deg^°

Rad

Math Response

Write the equation to find the area of this triangle.

Type answer here

Correct Answer: 6\times3\div2=9

Deg^°

Rad

Multiple Choice

What is the area?

• 15 sq cm

• 50 sq cm

• 6 sq cm

Multiple Choice

What is the base of this triangle?

• 4 cm

• 5 cm

• 4.8 cm

Multiple Choice

What is the height of this triangle?

• 4 cm

• 5 cm

• 4.8 cm

Draw

Circle the triangles that have the base and height correctly labeled.

Multiple Select

Andre drew a line connecting two opposite corners of a parallelogram. Which statements are true about the triangles made by the line Andre drew?

• Each triangle has a side that is the same length as the diagonal line.

• Each triangle has one side that is 3 units long.

• The two triangles have the same area as each other.

Hotspot

Which 2 triangles have the same area?

Multiple Choice

What is the formula to find the area of a triangle?

• Area = 1/2 * base * height

• Area = base + height

• Area = base * height

• Area = 2 * (base + height)

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident