This solid is formed by connecting a point A to all points of a polygon.
The name of such a solid is a [[Concept:Pyramid|pyramid]].
b
Let's use colors and markers to highlight congruent segments.
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Now we will summarize what we know about the sides of the two triangles.
Side of â–³ ACB
Side of â–³ ACD
Congruent?
Justification
AC
AC
Yes
Reflexive Property of Congruence
CB
CD
Yes
Given
BA
DA
Yes
Given
Since the two triangles have three pairs of congruent sides, according to the Side-Side-Side (SSS) Congruence Postulate these triangles are congruent.
â–³ ACB ongâ–³ ACD
</subexercise>
<subexercise id="c"><listcircle icon="c">This is a perspective 2D image of a 3D object. In such an image distances in different directions appear to be different.</listcircle>
