When you see the symbol "△", this denotes a triangle. Now combine the symbol with the letters FGH, this becomes △FGH, meaning a triangle FGH, with F, G, and H as the three points.
Now, the symbol "∠" means angle and "m∠" means the measure of an angle. So m∠F means the angle at the point F, m∠G means the angle at the point G, and m∠H means the angle at the point H. (I'll attach a diagram of this triangle).
Now we have to determine m∠H, which is the angle at point H. To do that, we have to find the value of
. To do that, we have to use one of the laws of a triangle, which is:
The sum of angles in a triangle = 180°. This means when we add all the angles in a triangle, it sums up to 180°. Let's do that.

Now that we have found the value of x as 18°, we can substitute its value to determine the angle H.

I hope you understand the explanation.
Answer:
3/10 or 0.3 or 30%
Step-by-step explanation:
Its 225/750 total students
We simplify this by dividing by 5
45/150
Divide by 5 again
9/30
Divide by 3
3/10
Answer:
║

[Corresponding Sides of similar triangles are proportional.]

Answer: 34.64 m
Step-by-step explanation:
Given: A boat is 60 m from the base of a lighthouse.
The angle of depression between the lighthouse and the boat is 37°.
By using trigonometric ratios :

here x= 37°, side opposite to x = height of lighthouse (h) , side adjacent to x = 60 m

Hence, the lighthouse is 34.64 m tall.