Note that a squared pyramid has a square base & 4 equal triangles.
To find the lateral the lateral area you calculate the area of the 4 equal triangles and to find the surface area (total Area) you add the area of the base:
Area of each triangle = side (5) x slant (9) and you divide by 2
==>Aera of 1 triangle = (9x5)/2 = 45/2 & for the 4 triangles
Lateral area = (45/2) x 4 = 90 in²
Now the base area (square) = 5 x 5= 25 in²
so the surface area = 90+25 = 115 in² (answer a)
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➷ The formula to calculate the circumference is 
d is the diameter (double the radius)
Substitute the values in:
Circumference = (3.14)(3 x 2)
Circumference = 18.84
It would be option D. 18.84 m
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➶ Hope This Helps You!
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Sorry but I am depressed and I just need points for this but I’ll help you :)
Answer:
Step-by-step explanation:
15:25 in it's simplest form is 3:5
3:5 as a decimal is 0.6
I hope that's right aha :3
The first equation equals 13
The second one equals 12
to help you discover the answer better I really think the second one
