Angles in Triangles and Polygons

# Angles in Triangles and Polygons - o B 360 o C 450 o 540 o...

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2 y 70 o 140 o E D C B A A B C D x +20 o 2 x 5 x a 3 a D C A B F E D C B A 38 o 60 o 24 o x D C B A 43 oo 40 o 3 x E D C B A 2 x – 8 o F E D C B A 48 o 55 o x F E D C B A A C H z y E D B F x 30 o 80 o 89 o 100 o 80 o M N B C H D A D C B A 3 x – 9 o x + y 140 o 2 x 3 x F E D C A B Angles in Triangles and Polygons Form 2 Section A Multiple Choice Questions In the figure, find y . A. 40 o B. 45 o 50 o C. 55 o In the figure, find ACB. A. 10 o B. 50 o 100 o C. 130 o o In the figure, find a . A. 30 o 32 o B. 33 o C. 35 o In the figure, find x . A. 84 o B. 98 o C. 122 o 130 o 1. The sum of interior angles of a polygon is 3060 o . Find the number of sides of the polygon. A. 17 B. 18 19 C. 20 In the figure, find ACB. A. 37 o B. 35 o 33 o C. 27 o 2. In the figure, find x . A. 42 o B. 46 o 1

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C. 48 o 52 o 3. Find the sum of the 6 marked angles in the figure. A. 540 o B. 580 o C. 640 o 720 o 4. The size of each exterior angle of a regular polygon is 30 o . How many sides are there in the polygon? A. 11 12 B. 13 C. 14 5. Each interior angle of a regular polygon is 144 o larger than each exterior angle. How many sides are there in the polygon? A. 10 20 B. 30 C. 40 Find x in the figure. A. 57 o B. 67 o C. 77 o 87 o 6. Find the sum of all marked angles in the figure. A. 270

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Unformatted text preview: o B. 360 o C. 450 o 540 o 7. In the figure, ∠ BAD = ∠ BCD, ∠ ABE = ∠ AEB = ∠ ADF = ∠ AFD, AE = EF = FA. Find ∠ BCD. A. 90 o B. 100 o C. 110 o 2 120 o Section B Long Questions 8. The size of each interior angles of a regular polygon is 8 times that of each exterior angle. (a) Find the size of each exterior angle of the polygon. (b) Hence, find the number of sides of the polygon. 9. In the figure, DE // FC. FBC, GEBH and ABD are straight lines. Find w , x , y and z . 3 10. In the figure, BD and AC are the angle bisectors of ∠ ADC and ∠ BCD respectively. Intersecting at H. If ∠ MAH = 80 o and ∠ NBH = 100 o , find ∠ CHD. 4 11. ∆ ABC is an equilateral triangle and AB ⊥ DB. Find y . 12. In the figure, CB // DE, BAF and DEF are straight lines. Find ∠ BAE and ∠ AFE. 5 6...
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## This note was uploaded on 09/21/2011 for the course MATH 103 taught by Professor Wouters during the Spring '08 term at Wisc Oshkosh.

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Angles in Triangles and Polygons - o B 360 o C 450 o 540 o...

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