Question

match the following items on the left with the items on the right by entering the correct letter in the box.
scalene△ a right triangle with 60°, 30°, right angle
obtuse△ b hexagon
hexagon c triangle with 120° angle
right△ d triangle with sides 4, 7, 12

Explanation:

Step1: Analyze Scalene△

A scalene triangle has all sides of different lengths. Figure D has sides 4, 7, 12 (all different), so Scalene△ matches D.

Step2: Analyze Obtuse△

An obtuse triangle has one angle greater than 90°. Figure C has a 120° angle (obtuse), so Obtuse△ matches C.

Step3: Analyze Hexagon

A hexagon has 6 sides. Figure B is a hexagon, so Hexagon matches B.

Step4: Analyze Right△

A right triangle has a 90° angle. Figure A has a right angle, so Right△ matches A.

Answer:

Scalene△: D
Obtuse△: C
Hexagon: B
Right△: A