Sandy builds this shape of 4 congruent triangles using clay and toothpicks. the area of each triangle is 17.6 centimeter square, and the height of the shape is 5.2 cm. what 3-d figure does the shape sandy built resemble? if this were a solid shape, what would be it's volume? round your answer to the nearest tenth.

Pyramid and not sure about the volume

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.