Answer:
Step-by-step explanation:
Since 
and 
are equal, we can set them equal to each other:
Substitute 
to solve for :
The first blank is 69 degrees
The shape you are looking for is a pyramyde
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1. Answer;
- Triangle
Explanation;
The cross section formed by a plane that contains a vertical line of symmetry for a tetrahedron is a Triangle.
A tetrahedron also a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertex corners.
2. Answers
- Triangle
Explanation;
The cross section formed by a plane that intersects three faces of a cube is a Triangle. A cross section is the shape we get when cutting straight through an object. The shape of the cross-section of a solid depends upon the orientation of the cutting plane to the solid.
Answer:
b
Step-by-step explanation:
b because it say's 1/5 and 7 it do not say negative so yea
