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Unformatted text preview: nterior vertex angle of 65Âº.
What is its area? 16. A rhombus has an area of 36 cm2 and edges of length 6.7 cm.
Give the sizes of its interior vertex angles. 17. A parallelogram has an area of 63 cm2.
One of its edgelengths is 7.2 cm, and one interior vertex angle is 54Âº.
What is its other edgelength? 18. Two triangles have the same area.
One has edges of 4.7 and 6.8 cm with an included angle of 49Âº.
The other has two edges measuring 7.3 and 3.9 cm respectively.
Calculate the size of one of the interior vertex angles of the second triangle. Â© Frank Tapson 2004 [trolPT:28] Trigonometry
The Sine Rule
In any triangle the length of any edge is
proportional to the sine of the opposite angle. 1.
2.
3.
4.
5.
6. T/33 B
a c
b
a
c
=
=
sine B
sine A
sine C A C b
find b C = 73Âº c = 5.3 cm
a = 11 cm âˆ BAC = 36Âº AC = 4.3 cm BC = 6.7 cm find âˆ ABC Triangle XYZ has âˆ YXZ = 28Âº âˆ YZX = 73Âº YZ = 9.3 cm find XY Triangle PQR has P = 41Âº p = 7.89 cm r = 10.1 cm find Q Triangle LMN has âˆ LMN = 56Âº âˆ...
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This document was uploaded on 03/01/2014.
 Spring '14

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