The Impact of Social Media on Society
In this article, we explore the ways in which social media has shaped and influenced society in both positive and negative ways. We delve into the impact of social media on communication, relationships, mental
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About The Impact of Social Media on Society
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Slide1AREA OF COMPOSITE FIGURES
Slide2COMPOSITE FIGURES A composite figur e is made of triangles, quadrilaterals, semicircles, and other 2-D figures. A semicircle is half of a circle. Examples: SEMICIRCLE RECTANGLE TRAPEZOID TRIANGLE To find the area of a composite figure, separate it into figures with areas you know how to find. Then add those areas.
Slide3Let’s find the area of the following composite figure. AREA OF COMPOSITE FIGURES 6 cm 3 cm 14 cm This figure can be separated into a rectangle and a semicircle . Now we just find the area of each figure. AREA OF RECTANGLE: A = lw A = 14 3 A = 42 cm 2 AREA OF SEMICIRCLE: A = r 2 ( this is area of a 2 circle, cut in ½) A = 3.14 4 4 2 A = 50.24 = 25.12 cm 2 2 BOTH AREAS ADDED TOGETHER: 42 + 25.12 = 67.12 cm 2
Slide4Now you try to find the area of the following composite figure. AREA OF COMPOSITE FIGURES This figure can be separated into a triangle and ¾ of a circle . Now we just find the area of each figure . AREA OF TRIANGLE: A = bh 2 A = 12 3 2 A = 36 = 18 cm 2 2 AREA OF CIRCLE: A = r 2 (this is area of a WHOLE circle) A = 3.14 3 3 A = 28.26 cm 2 (WHOLE CIRCLE) Now, we only need area for 3 parts of the circle ; so we need to divide the area by 4 to get ¼ then multiply by 3 to get ¾. 28.26 ÷ 4 = 7.065. 7.065 3 = 21.195 cm 2 is ¾ of circle. 3 cm 12 cm Together: 18 + 21.195 = 39.195 cm 2 for the area of the composite figure.
Slide5Now you try again to find the area of the following composite figure. AREA OF COMPOSITE FIGURES This figure can be separated into a square & a rectangle . Now we just find the area of each figure . AREA OF SQUARE: A = side side A = 3 3 A = 9 cm 2 AREA OF RECTANGLE: A = bh A = 12 3 A = 36 cm 2 3 cm Together: 9 + 36 = 45 cm 2 for the area of the composite figure. 9 cm 12 cm 6 cm
Slide6Sometimes you have to find the area of the shaded region in each figure. o This figure is a large circle with a small circle inside it. o To find the area of just the shaded part (the outer circular part), o we need to find the area of both the larger circle and the smaller o white filled circle, and then subtract the two areas to get just the shaded circle’s area. AREA OF SHADED PARTS OF FIGURES AREA OF LARGE CIRCLE: A = r 2 A = 3.14 4 4 A = 50.24 m 2 8 m 6 m AREA OF SMALL CIRCLE: A = r 2 A = 3.14 3 3 A = 28.26 m 2 Now, we take the 2 areas and subtract: 50.24 – 28.26 = 21.98 m 2
Slide7Now you try o This figure is a large circle inside a square. o Find the area of only the rectangle part showing around the circle. AREA OF SHADED PARTS OF FIGURES AREA OF CIRCLE: A = r 2 A = 3.14 6 6 A = 113.04 m 2 12 m 6 m AREA OF SQUARE: A = s 2 A = 12 12 A = 144 m 2 Now, we take the 2 areas and subtract: 144.00 – 113.04 = 30.96 m 2