Splash Screen

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Splash Screen
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5-Minute Check 1
Find the perimeter of the figure. Round to the
nearest tenth if necessary.
A. 48 cm B. 56 cm C. 101.1 cm D. 110 cm
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5-Minute Check 2
Find the perimeter of the figure. Round to the
nearest tenth if necessary.
A. 37.9 ft B. 40 ft C. 43.9 ft D. 45 ft
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5-Minute Check 3
Find the area of the figure. Round to the
nearest tenth if necessary.
A. 58 in2 B. 83 in2 C. 171.5 in2 D. 180 in2
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5-Minute Check 4
Find the area of the figure. Round to the
nearest tenth if necessary.
A. 9.0 m2 B. 62 m2 C. 5 m2 D. 3.4 m2
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5-Minute Check 5
Find the height and base of the parallelogram if
the area is 168 square units.
A. 11 units 13 units B. 12 units 14 units C. 13
units 15 units D. 14 units 16 units
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5-Minute Check 6
The area of an obtuse triangle is 52.92 square
centimeters. The base of the triangle is 12.6
centimeters. What is the height of the triangle?
A. 2.1 centimeters B. 4.2 centimeters C. 8.4
centimeters D. 16.8 centimeters
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CCSS
Content Standards G.MG.3 Apply geometric methods
to solve problems (e.g., designing an object or
structure to satisfy physical constraints or
minimize cost working with typographic grid
systems based on ratios). Mathematical
Practices 1 Make sense of problems and persevere
in solving them. 7 Look for and make use of
structure.
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Then/Now
You found areas of triangles and parallelograms.

• Find areas of trapezoids.

• Find areas of rhombi and kites.

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Vocabulary

• height of a trapezoid
• the perpendicular distance between its bases

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Vocabulary
Formula Area of a Trapezoid
 
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Vocabulary
Formula Area of a Rhombus or Kite
 
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Example 1
Area of a Trapezoid
SHAVING Find the area of steel used to make the
side of the razor blade shown below.
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Example 1
Area of a Trapezoid
Find the area of the pool outlined below.
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Example 2
Area of a Trapezoid
OPEN ENDED Miguel designed a deck shaped like
the trapezoid shown below. Find the area of the
deck.
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Example 3A
Area of a Rhombus and a Kite
A. Find the area of the kite.
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Example 3B
Area of a Rhombus and a Kite
B. Find the area of the rhombus.
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Example 4
Use Area to Find Missing Measures
ALGEBRA One diagonal of a rhombus is half as
long as the other diagonal. If the area of the
rhombus is 64 square inches, what are the lengths
of the diagonals?
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Example 4
Use Area to Find Missing Measures
Trapezoid QRST has an area of 210 square yards.
Find the height of QRST.
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Concept 3
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End of the Lesson