# Math Help - triangle

1. ## triangle

question: part of a lifting
• the longest member is called the tie bar and is angled at 7o degrees to the horizontal
• the other long member is called the strut and is angled at 80 degrees to the horizontal
• the length of the base is 1.4m
work out the lengths all the members and angles involved

diagram attached

2. use the law of sines ...

$\frac{a}{\sin{A}} = \frac{b}{\sin{B}} = \frac{c}{\sin{C}}$

3. Originally Posted by kath
question: part of a lifting
• the longest member is called the tie bar and is angled at 7o degrees to the horizontal
• the other long member is called the strut and is angled at 80 degrees to the horizontal
• the length of the base is 1.4m
work out the lengths all the members and angles involved

diagram attached
I've modified your sketch a little bit: You know all three interior angles of the triangle.
Use Sine rule to calculate the length of the two sides of the triangle.