<h2> ☞ANSWER☜</h2>
<h3>3D shapes</h3>
- Cube	Cuboid
- Sphere	Square-based pyramid
- Cylinder	Triangular prism
- Pentagonal pyramid	Hexagonal prism
<h2> ☞EXPLANATION☜</h2>
<em><u>A solid of revolution is a three-dimensional figure obtained by rotating a two-dimensional figure (or curve) around a straight line (called the axis) that lies in the same plane. ... Since the triangle's interior is shaded, it creates the interior of the cone, creating a solid figure.</u></em>
<em><u>Three dimensional shapes are obtained by rotating the two dimensional shapes. When a circle is rotated we get sphere; when a triangle is rotated we get cone; when rectangle or square is rotated we get cylinder</u></em>
 
        
        
        
D. y = 9 because it has a complete zero slope while the y-intercept of the equation is 9, so the equation is y = 9.
 
        
                    
             
        
        
        
The sum of the angles in a triangle is 180, so the equation will be :
2k+k+45= 180
add similar variables 
3k+45=180
3k=135 (divide each side by 3)
k= 45
So 2k equals= 90
k=25 
This is right angle triangle for your info! 
        
             
        
        
        
It’s b 
I think…………………………………………..
        
             
        
        
        
The angle is 90° degrees.