Triangle abc is similar to triangle def.
for the following statements determine whether they are true or false then select which combination of answers is correct.
1) sin(a) < sin(f)
2) cos(c) = sin(d)
3) tan(d) > tan(a)
options:
a. 1 - false, 2 - true, 3 - false
b. 1 - false, 2 - false, 3 - true
c. 1 - true, 2 - true, 3 - false
d. 1 - true, 2 - false, 3 - true

Multiplying an even number of negative numbers gives an answer that is choose from:

Triangle xyz has vertices x(1,3), y(0,0)

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.