Remember: Cut a shape into rectangles and triangles. Add the areas of the pieces.
Pieces you know
1
The shape is cut into two rectangles by the line. What is the area of the top piece in square units?
2
Which addition gives the area of the whole shape in square units?
7 + 314 + 614 × 6
3
What is the area of the whole shape in square units?
4
A triangle with a base of 4 and a height of 6 has an area of 24 square units.
TrueFalse
5
This triangle has a base of 6 and a height of 3. What is its area in square units?
6
The cut makes which two pieces?
a rectangle and a triangletwo rectanglestwo triangles
7
The arrow is a square 4 by 4 and a triangle with a base of 4 and a height of 3. What is the area of the arrow in square units?
8
Join each shape to its area in square units.
1rectangle 6 by 4
2triangle, base 8, height 3
3rectangle 3 by 7
4triangle, base 5, height 6
A21
B12
C15
D24
9
Which cut makes one rectangle and one triangle?
Cut 1Cut 2Cut 3
10
The T-shape is cut along the line into a wide rectangle and a tall one. What is the area of the whole T in square units?
11
A 4 by 3 rectangle and a 2 by 5 rectangle are joined to make one shape. The shape has an area of 22 square units.
TrueFalse
12
Number the steps to find the area of the arrow.
Find the area of the triangle: half of base times height
Add the two areas
Cut it into a rectangle and a triangle
Find the area of the rectangle: wide times tall
13
Cut the T-shape another way. Draw your cut. Write the area of each piece and the area of the whole T.
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