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Help with these two maths trig questions please? Watch

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    For the 1st 2 marker question I understand the opposite angle is 73 degrees because it's isocles and that's all I've gotten.
    However on question 2 I've wrote so far...
    (not sure if its correct)
    all angles are 60 degrees in the triangles and the sides are 10. So I should half the rectangle into a right angled triangle and the side would be 20 cm and the angle 90 degrees and use tan?
    but that's where im stuck
    please explain and offer me guidance
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    I think this is the answer for the first one... Like you already said, you knew the opposite angle would also be 73 degrees as it's an isosceles triangle. So 180 - 73 - 73 = 34. I then used the sin rule and worked backwards. Hope it makes sense. I'll try and figure out the second one for you.
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    For the second one, try working out the two angles in the top triangle bit, working out what kind of triangle it is, and using some properties of said triangle to find lengths? I'll start you off; 180 - 60 = ...
 
 
 
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