Answer:
4 cm
Step-by-step explanation:
15, 20, and 25 are a Pythagorean triple, (225+40=625) thus they form a right triangle. The shortest altitude of any right triangle is going to be that of the hypotenuse. All three of the right triangles formed by the altitude on hypotenuse are similar. Thus 15:25 = a:10.
a=6.
Xd = y(L-d) then divide by "y"
xd/y = L - d then add "d"
xd/y + d = L
60°, 120° and 180° are the angles at which it will map onto itself.
Answer:
40
Step-by-step explanation:
2 •(3(5+2)-1)
2 ·(3(7)-1)
2·(21-1)
2·20
=40