Unit 4 Practice Assessment Select all statements that are true about equilateral triangle $A B C$.
a. Angles $B$ and $C$ are 60 degrees.
b. $x=3 \sqrt{3}$
c. $x=6 \sqrt{3}$
d. Triangle $A B D$ is congruent to triangle $A C D$.
e. $B D$ and $C D$ are both 3 units long.
f. The area of triangle $A B C$ is 18 square units.
g. The area of triangle $A B C$ is $18 \sqrt{3}$ square units.
h. The area of triangle $A B C$ is 36 square units.

Answer

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Answer

Only statement a is true: $\boxed{\text{Angles B and C are 60 degrees}}$

Steps

Step 1 ：Analyze each statement for equilateral triangle ABC with side length x

Step 2 ：Only statement a is true: $\boxed{\text{Angles B and C are 60 degrees}}$