PLEASE HELP DON'T ANSWER THE QUESTION IF YOU DON'T KNOW THE ANSWER 1. The height of a regular quadrilateral pyramid H=9cm, and the base edge is a=12c. Calculate the area of the parallel section which is at a distance r=3cm from the top.

2. The area of the base of a pyramid is 150cm, the area of a parallel section is 54cm, and the distance between them is 14cm. Calculate the height of the pyramid

3. A triangular pyramid with base edges b cm, 11cm and 15cm is intersected by a plane parallel to the base and passing through the middle of the height. Calculate the area of the intersection.

4. The base of a regular hexagonal pyramid is a = 5cm, and the side edge with the plane of the base occupies an angle of 60°. Calculate the area of the largest Diagonal section.

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$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

their is no graph showing

step-by-step explanation:

step-by-step explanation:

when the line is solid:

when the line is dashed:

this > inequality sign means:

this < inequality sign means:

this > inequality sign means:

this < inequality sign means:

about the problem:

srry i'm not done ! i'll