Question

the tree diagram below shows the classification of some polygons.
tree diagram: polygon branches to pentagon, triangle, hexagon, heptagon, quadrilateral, octagon. triangle branches to acute triangle, obtuse triangle, right triangle. quadrilateral branches to parallelogram, trapezoid. parallelogram branches to rectangle, rhombus. rectangle and rhombus branch to square.
a figure that has 3 sides, 3 vertices, and 3 angles that are less than 90° best describes which term?
□ rhombus
□ rectangle
□ triangle
□ acute triangle

Explanation:

1. Analyze each option:

• Rhombus: A rhombus is a quadrilateral (4 sides), so it doesn't have 3 sides. Eliminate.
• Rectangle: A rectangle is also a quadrilateral (4 sides), so it doesn't have 3 sides. Eliminate.
• Triangle: A triangle has 3 sides, 3 vertices, and 3 angles, but this is a general term. The question specifies angles less than 90°.
• Acute Triangle: An acute triangle is a type of triangle with 3 sides, 3 vertices, and all 3 angles less than 90°, which matches the description.

Answer:

D. Acute Triangle