Answer:

Step-by-step explanation:
Consider similar triangles BMC and KMN.
In these triangles,

where O is the point of intersection of BC and MP.
Note that segment OP has the length the same as the side of the square ABCD. Hence,

Step-by-step explanation:
we know that perimeter of triangle is equals to side + side + side
but we can see that the particular triangle is having all the sides equal so it is seen to be equal lateral triangle and formula of equilateral triangle is 3 × sides.....
So,We will take sides common.....
Perimeter of equilateral triangle= 3×Side
3×4.6 cmsq.
13.8cmsq. Answer
Answer:
85°
Step-by-step explanation:
AED and DEB would add up to 180, the same goes for AEC and CEB