The lengths of the sides of a triangle are 10, 13, and 19. classify the triangle as acute, right, or obtuse.

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Math each whole number with a rational, exponential expression

∆red ≅ ∆ by rule will give brainiest if possible