Understanding the Area of Triangles

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

• base * height

• 1/2 * base * height

• 2 * base * height

• base + height

Which of the following is a correct statement about the height of a triangle?

• The height is the same as the base.

• The height can be slanted.

• The height is always the longest side.

• The height must be a straight line.

Why is it incorrect to choose a slanted side as the height of a triangle?

• Because it is not visible in all triangles.

• Because it is always shorter than the base.

• Because it is not a part of the triangle.

• Because it is not perpendicular to the base.

If a triangle has a base of 7 inches and a height of 3 inches, what is its area?

• 21 square inches

• 10.5 square inches

• 14 square inches

• 7 square inches

What is the result of 21 divided by 2?

• 11

• 9.5

• 10.5

• 10