Answer:
The answer is the third picture
Step-by-step explanation:
Here's the solution,
The given triangle is an <u>equilateral triangle</u>, because it's all angles measure 60° each
now,
Area of an equilateral triangle :
=》

where,
=》

=》

=》

or
=》

Answer:
0.4375
Step-by-step explanation:
Answer: 75 degrees
Step-by-step explanation: supplementary means 180 so you do 180-105 which is 75