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Unformatted text preview: s. In one case,
the front leg (with the steps in it) is 2.8 metres long and the back (supporting) leg is
2.5 metres long. When in the working position, the angle between the legs is 40 degrees.
What is the distance apart of the two legs on the floor? 20. A rhombus has all its edges 12.7 cm long. Its acute angle is 64º.
Find the length of its shorter diagonal © Frank Tapson 2004 [trolPT:30] Given
Given Given A = 60º find a C = 35º find c A = 50º find a B = 40º find b c = 8 cm find A c = 7 cm find B c = 3 cm find C C = 90º find c A = 130º find a B = 146º find b c = 5.5 cm find A c = 16.2 cm find C c = 6 cm c = 14.8 cm find the size of the
find the size of the
find the sizes of all 3 angles c = 15.3 cm find the sizes of all 3 angles Trigonometry
a, b, c are lengths of three edges of triangle ABC
s is length of semi-perimeter
s = a+b+c
Heron's or Hero's formula
for finding the area of a triangle T/35 Circumscribed circle
Radius R = 4 × Area
or R = a
2 sine A Area = √ s(s – a)(s – b)(s – c)
Only 1 (of 3 possible) is shown
drawn on edge a Inscribed circle
radius r = Area...
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This document was uploaded on 03/01/2014.
- Spring '14