Answer:
This mental multiplication trick uses the idea of a third number - a base number - to help us multiply two numbers in your head. This lesson looks at multiplying numbers near 10 using base 10. Fast Mental Multiplication Trick - Multiply in your head using base 20 and 30 How to multiply numbers near 20 and 30
Hope it helps
Answer:
Option B. 3 is the answer.
Step-by-step explanation:
To draw a circumcenter of a triangle we draw the perpendicular bisectors of the the sides of the triangle first.
Intersection point of these perpendiculars drawn is the circumcenter of the circle.
Distances of the circumcenter to the vertices are same, that means distance of circumcenter from the vertex is the radius of the circle.
Therefore, length of AE and AD will be same in measure.
AE = AD
2n + 4 = 10
2n = 10 - 4
2n = 6
n = 3
Therefore, Option B. 3 is the answer.
Answer:
(a) 750
(b) 1875
(c) 4875 or as a fracion 7/20
Step-by-step explanation:
Answer:
The lateral area of the regular prism is 
Step-by-step explanation:
we know that
The lateral area of the regular prism is equal to

where
P is the perimeter of the base
h is the height of the prism
<em>Find the perimeter of base P</em>
-----> the regular pentagon has 5 equal sides
we have

substitute in the formula
