You could also describe the sides as congruent – they are exactly the same length. This means that this triangle is equilateral. Let's look at another triangle. You can see that there are two ...

Give reasons for your answer. Answer: Two triangles need not be congruent, because MN and EF are not corresponding sides in the two triangles. It is because, in a triangle, the sum of any two ...

(ii) All the congruent figures are similar but the ... (iv) If a line is drawn parallel to one side of a triangle to intersect the other two sides in distinct points, then the other two sides ...

you can instead find the area of these triangles (using “½ base x height”) and add them up to get the answer. If two polyhedra are scissors congruent, then they have to have the same Dehn ...