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Big Ideas Math: Modeling Real Life, Grade 6

BI

Big Ideas Math: Modeling Real Life, Grade 6 View details

2. Areas of Triangles

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Exercise 15 Page 295

To find the area, calculate half of the product of the base and the height.

1125 cm^2

Practice makes perfect

Let's find the area of the given triangle pennant. The area of a triangle is half the product of its base and its height.

In the pennant, we can see that the base is 30 centimeters and that the height is 75 centimeters. We can substitute these two values into the formula for the area of a triangle and simplify. Let's do it!

A=1/2bh

b= 30, h= 75

A=1/2( 30)( 75)

▼

Evaluate right-hand side

Multiply

A=1/2(2250)

MoveRightFacToNumOne

1/b* a = a/b

A=2250/2

Calculate quotient

A=1125

The area of the pennant is 1125 square centimeters.

Subchapter links

Try It p.292-293

Self-Assessment for Concepts & Skills p.293

Self-Assessment for Problem Solving p.294

Review & Refresh p.295