18 - Geometry Flashcards
1
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Two equations for Area of a Triangle (not equilateral)
A
1/2 * base * height
(leg*leg)/2
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34
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Similar shapes: ratio of the side is x:y, the ratio of the area is
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x2:y2
35
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One way to estimate the area of a triangle is by
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dividing it into smaller shapes.
36
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37
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Arc angle =
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Central angle
38
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Angle adjacent to arc is
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1/2 the Central Angle
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50
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56
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57
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58
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59
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60
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61
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Equation for Equilateral Triangle
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s2(radical 3)/4
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63
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64
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65
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68
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70
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71
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72
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73
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74
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What is the measure of angle ADB?
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There is not enough information to know. Don’t assume that a line cutting through the 90 degree angle cuts it in half. In this case it is 50 degrees.
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80
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81
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84
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85
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86
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87
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88
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89
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90
Q
Isosceles Triangle when a line is drawn from base to altitude is
A
Cut into two equal triangles
