Rectangles
What is the formula for the area of a rectangle?
A=bh
or
A =lw
What is the formula for the area of a triangle?
A=(1/2)bh
or A=bh/2
True or false: a parallelogram and a trapezoid both have exactly two pairs of parallel sides.
FALSE- a trapezoid has to have at least 1 pair of parallel sides (but CAN have two) and a parallelogram has two pairs of parallel sides.
Shannon is creating a rectangular garden that is 10ft by 12ft. What is the area inside the garden in square feet?
120 sq. feet
What "trick" do we use for dividing fractions?
KCF, keep change flip
If the area of a rectangle is 92 square feet and the height is 8 feet, what is the base? Use A=bh and algebra to solve.
the base is 11.5 feet.
Find the area of a triangle that has a base of 10 yds and a height of 11 yds.
55 sq yds
Draw a trapezoid on your board.
Answers may vary but the shape shown must have at least one pair of parallel sides.
Draw and label a square that has side lengths that are 3.5cm. What is the area of the square?
The area is 12.25 sq cm.
Explain the difference between area and perimeter.
A rectangle has a base of 11.4 cm and a height of 18.9 cm. What is the area?
215.46 sq cm
Find the area of a triangle whose base is 12.5 ft and whose height is 10ft.
62.5 ft squared
Draw a parallelogram on your board.
A parallelogram must have two pairs of parallel sides and opposite angles equal.
A square, rectangle, and rhombus are all examples of parallelograms.
A rectangle has a base given by the expression 9. The height of the rectangle is 2x+3.
Write an algebraic expression using the formula A=bh.
You do not need to find the area.
A= (9)2x+3 OR
18x+27
What is 1/2 + 3/8?
7/8
Draw your own rectangle. Label the base, height, and then find the area in square units. Everything must be labeled.
Base, height, area, and square units must be correct for points. Everything must be labeled.
A triangle has a base of 75cm and a height of 45cm. What is the area?
1,687 1/2 sq feet
Find the area of this trapezoid by decomposing it into a rectangle and triangle:
https://www.softschools.com/math/geometry/topics/area_of_trapezoid/
Area = 26 sq meters
A rectangle has the following dimensions.
The base of the rectangle is represented by x+8. The height of the rectangle is represented by 2.
Write an algebraic expression that represents the AREA.
2(x+8) or 2x+16
Change 56 and 4/9 to an improper fraction.
508/9
Is 144 a perfect square? How do you know?
Yes, because 12x12=144. 144 could be the area of a square.
A triangle's area is 60cm squared. The base is 10cm squared. What is the triangle's height? Plug in what you know into the formula and then solve for h.
The height of the triangle is 12 cm.
Explain in your own words why the formula A=bh works for a parallelogram (even though it's the formula for the area of a rectangle).
Any parallelogram can be decomposed and rearranged into a rectangle without changing the base or the height.
Karen is buying a rectangular rug from TJ Maxx. The dimensions of the rug are 3 1/2 ft by 7 ft. What is the total area of the rug Karen is buying?
24 1/2 sq. feet
DAILY DOUBLE! This question is worth 1000 points.
Subtract.
5 2/4 - 2 1/3 = ?
3 1/6