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Areas of Polygons and Circles
Chapter 11 Areas of Polygons and Circles
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11.1 Areas of Parallelograms
The height is always perpendicular to the base b A = bh h l A =lw w A = s2 s
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11.1 Areas of Parallelograms
Find the perimeter and area of
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11.1 Areas of Parallelograms
Find the perimeter and area of
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11.1 Areas of Parallelograms
Find the area of
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11.1 Areas of Parallelograms
Find the area of the figure. Round to the nearest tenth if necessary.
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11.1 Areas of Parallelograms
Find the height and base of the parallelogram if the area is 168 square units.
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11.2 Areas of Triangles h b A = bh h b
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11.2 Areas of Triangles Find the area of the figure. Round to the nearest tenth if necessary.
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11.2 Areas of Triangles The height of a triangle is 12 inches more than its base. The area of the triangle is 560 square inches. Find the base and the height.
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11.2 Areas of Trapezoids b1 A = h(b1+b2) h b2 median A =h x median h
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11.2 Areas of Trapezoids Find the area of the trapeziod.
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11.2 Areas of Trapezoids Find the area
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11.2 Areas of Trapezoids Trapezoid QRST has an area of 210 square yards. Find the height of QRST.
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11.2 Areas of Rhombi A = d1d2 d1 d2
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11.2 Areas of Rhombi Find the area of the rhombus.
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11.2 Areas of Rhombi 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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11.3 Areas of Regular Polygons
Write the formula Try to find the Perimeter Find the # of degrees in the shape Divide by the # of sides Divide by 2* Use sin-cos-tan to get the apothem Substitute and solve a * A = Pa a * a = apothem
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11.3 Areas of Regular Polygons
What is the area of an octagon with an apothem length of 14 inches? Round to the nearest tenth if necessary.
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11.3 Areas of Regular Polygons
Find the area of the regular hexagon. Round to the nearest tenth.
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11.3 Areas of Regular Polygons
Find the area of the regular pentagon. Round to the nearest tenth.
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11.3 Areas of Circles and Sectors
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11.3 Areas of Circles and Sectors
Find the area of the circle. Round to the nearest tenth.
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11.3 Areas of Circles and Sectors
Find the area of the semi-circle. Round to the nearest tenth.
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11.3 Areas of Circles and Sectors
Find the radius of a circle with an area of 58 square inches.
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11.4 Composite Figures POOL The dimensions of an irregularly shaped pool are shown. What is the area of the surface of the pool?
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11.4 Composite Figures Find the area of the shaded figure.
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11.4 Composite Figures Find the area of the figure in square feet. Round to the nearest tenth if necessary.
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11.4 Composite Figures Find the area of the figure. Round to the nearest tenth if necessary.
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11.4 Composite Figures Find the area of the shaded region. Assume that the polygon is regular. Round to the nearest tenth.
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11.4 Composite Figures Find the area of the shaded region. Assume that the polygon is regular. Round to the nearest tenth.
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11.5 Geometric Probability and Areas of Sectors
Area of region you want Probability = Area of whole shape/region
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11.5 Geometric Probability and Areas of Sectors
Find the area of the sector. Round to the nearest tenth.
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11.5 Geometric Probability and Areas of Sectors
A pie has a diameter of 9 inches and is cut into 10 congruent slices. What is the area of one slice to the nearest hundredth?
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11.5 Geometric Probability and Areas of Sectors
A pizza has a diameter of 14 inches and is cut into 8 congruent slices. What is the area of one slice to the nearest hundredth?
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