Two different cross sections are taken parallel to the base of a three-dimensional figure. The two cross sections are the same s
2 answers:
<h2>Answer:</h2>
A. cone
D. triangular pyramid
E. square pyramid
(Look at the photo at the bottom.)
<h2>Step-by-step explanation:</h2>First, know what a cross section is. A cross section is the exposed shape or surface when a straight cut is made through a 3D figure. For example, if I make a cross section, or cut, through a sphere, the cross section will be a circle. The newly exposed surface is in the shape of a circle.
We want to know which 3D figures can make 2 different cross sections, parallel to the base, that are congruent. Congruent means <em>same shape but different size.</em> <em>Parallel to the base</em> means the cut is completely horizontal.
- A cone is one, because no matter where you horizontally cut this, the cross section will always be a circle, but different sizes.
- A triangular pyramid is another, because no matter where you horizontally cut this, the cross section will always be a triangle, but different sizes.
- A square pyramid is another, because no matter where you horizontally cut this, the cross section will always be a square, but different sizes.
Here's a photo of Edge incase you're doubtful.
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Answer:
136 m²: 188 m²
Step-by-step explanation:
I think your question missed key information, allow me to add in and hope it will fit the orginal one. Please have a look at the attached photo
My answer:
Given the information:
- The height: 4m
- The lenght: 13m
- The width 4m
The lateral area:
As we know, the lateral area can be calculated by the following formula:
= the perimeter of the base* the height
= (13 + 4 + 13 + 4)*4
= 136 m²
The surface area:
As we know, the lateral area can be calculated by the following formula:
= The lateral area + thhe base area + the top area
= 136 + 13*4 + 13*4
= 136 + 52 + 52
= 240 m2
