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[DOCX File]Title of the Lesson: ‘TICK TOCK’! Area of in-circle of an ...
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Area of in-circle of an equilateral triangle . Brief description of the lesson . Given an equilateral triangle pupils will be required to find the area of its in circle using different methods. Using a real life example of a round clock in a triangular frame pupils will look for methods of finding the area of the clock face. Aims of the Lesson:
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[DOC File]Areas of Regular Polygons
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Theorem 11.3 – Area of an Equilateral Triangle. The area of an equilateral triangle is one fourth the square of the length of the side times. A = ¼s2. Finding the Area of a Regular Polygon. Think of the hexagon below as . inscribed. in a circle. The . center of the polygon. and . radius of the polygon . are the center and radius of the ...
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The height of the equilateral triangle would be equal to the length of the longer leg of the 30–60–90 triangle, which is times longer than the shorter leg. So, the height is 7.5 ≈ 13.0 cm. a. AB = 48 units, BD = 36 units. To find BD, use triangle BCD as a 30–60–90 triangle. Given CD, multiply by to find that BD = 36.
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[DOC File]Name: __________________________________________ Date
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Height is measured as the _____ distance from the base of the triangle to its highest point. Don’t get snared: Sometimes the height of a triangle can be _____ the triangle. In a right triangle, the height of the triangle can also be one of the sides. However, be careful when finding the area of a non-right triangle.
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[DOC File]Problem 4
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The Luxor Hotel in Las Vegas is built in the shape of a pyramid.When you look at the pyramid from the outside, each face (side) of the pyramid is a glass equilateral triangle. 1. Each face is an equilateral triangle with a base that is 646 feet and a height …
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[DOCX File]1
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2 .An equilateral triangle has a side length of 13 feet. Find the height of the triangle. 3. Lenny is planning to cut down a pine tree, and he wants to make sure that the tree will not hit his truck when it falls. The tree casts a shadow that is 150 feet long, and the angle of elevation from the base of the shadow to the top of the tree is 50
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[DOC File]Lesson #1: Area of Circles
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• An equilateral triangle contains three sides of the same length. All equilateral triangles are also equiangular. Example 1: Classify the following triangle. Solution: The triangle has three sides of equal length, and therefore it is an equilateral triangle. All equilateral triangles have angle measures of 60º, 60º, and 60º.
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[DOC File]Lesson Observation - Townley
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Reverse Calculations – two methods for finding, say, the base of a triangle given its perpendicular height and area: substitute and solve or rearrange the formula. Questions for groups. Plenary: Reverse Calculation Bingo What if you have a rectangle with an area of 10cm2.
height of an equilateral triangle

[DOC File]y1 ch 4 - Derry Township School District
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MP-70. An equilateral triangle of side length L has a height of approximately 0.866L. For example, if L = 10 cm, then its height is approximately 8.66 cm. a) Sketch an equilateral triangle on your paper. b) Find the approximate heights of three equilateral triangles of side lengths 10 centimeters, 20 inches, and 8 feet.
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[DOCX File]G.8b Just in Time Quick Check - Virginia Department of ...
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∆ABC . is an equilateral triangle with a side length 12 inches. ... want to find the longer leg length without first finding the shorter leg. This is particularly true when no figure is given. ... is that they do not realize the height of an equilateral triangle is also the perpendicular bisector.
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Finding height of an equilateral triangle