Answer:
Surface area of square pyramid = 
Step-by-step explanation:
Let, b is the length of the base and s is the slant height
According to given condition:
b = 8 cm
s = 6 cm
Find out:
Surface area of square pyramid = ?
Formula:
Surface area of square pyramid = 
Solution:
Surface area of square pyramid =
Surface area of square pyramid = 
Surface area of square pyramid = 
Surface area of square pyramid =
Remmeber that an octagon is a polygon formed by chain of 8 straight line segments.
The first valid name for a polygon of eight sides is octagon (from greek oktagonon, which means eight angles)
The second valid name for a polygon of eight sides is eight-sided polygon.
The third valid name of a polygon of eight sides is 8-gon. After 6 sides, mathematicians usually refer to these polygons as n-gons, so an eight-sided polygon will be an 8-gon.
We can conclude that the three valid names for an octagon are: octagon, eight-sided polygon, and 8-gon.
Answer: 12500
Step-by-step explanation: 10000 x 5% = 500. 500 x 5 = 2500. 10000 + 2500 = 12500
They are equal so...
15x+2 = 9x+20
15x-9x = 20-2
6x =18
x = 18/6 = 3
x = 3
Answer:
Interior = 60°
Exterior = 120°
Step-by-step explanation:
A triangle has 180° in total.
We have 2 angles, 70 and 50
70 + 50 = 120
For Angle U, we do 180-120 = 60
So the interior angle is 60°
A line is straight and is 180°
With angle U being 60°, and being on a straight line, 180-60 = 120
So exterior angle is 120°
