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Vocabulary height of a trapezoid- the perpendicular distance between its bases.

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Presentation transcript:

Splash Screen

Find the perimeter of the figure 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 5-Minute Check 1

Find the perimeter of the figure 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 5-Minute Check 2

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 5-Minute Check 3

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 5-Minute Check 4

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 5-Minute Check 5

The area of an obtuse triangle is 52. 92 square centimeters 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 5-Minute Check 6

Mathematical Practices 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. CCSS

You found areas of triangles and parallelograms. Find areas of trapezoids. Find areas of rhombi and kites. Then/Now

the perpendicular distance between its bases height of a trapezoid: the perpendicular distance between its bases Vocabulary

Formula: Area of a Trapezoid Vocabulary

Formula: Area of a Rhombus or Kite Vocabulary

Area of a Trapezoid SHAVING Find the area of steel used to make the side of the razor blade shown below. Example 1

Find the area of the pool outlined below. Area of a Trapezoid Find the area of the pool outlined below. Example 1

Area of a Trapezoid OPEN ENDED Miguel designed a deck shaped like the trapezoid shown below. Find the area of the deck. Example 2

A. Find the area of the kite. Area of a Rhombus and a Kite A. Find the area of the kite. Example 3A

B. Find the area of the rhombus. Area of a Rhombus and a Kite B. Find the area of the rhombus. Example 3B

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? Example 4

Use Area to Find Missing Measures Trapezoid QRST has an area of 210 square yards. Find the height of QRST. Example 4

Concept 3

End of the Lesson