How many right angles are formed when two perpendicular lines intersect?

4 right angles at the intersection

Step-by-step explanation:

in total with the 2 perpendiculars that form 2 right angles at each in the initial point the total should probably be 8

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

-2x-4

step-by-step explanation: