Me
on a bicycle trail, the city is painting arrows like the one shown below. calculate the area of the arrow by decomposing it into rectangles and triangles.

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

How would you find the height of points on the circle? the topic is trigonometry.