Triangle Inequality Theorem and Triangle Sum

State if the three numbers can be measures of the sides of a triangle.
$$10,18,12$$  

State if the three numbers can be measures of the sides of a triangle.
$$8,10,20$$  

State if the three numbers can be measures of the sides of a triangle.
$$18,7,10$$  

State if the three numbers can be measures of the sides of a triangle.
$$11,1,12$$  

Two sides of a triangle have the following measures. Find the range of possible measure for the third side.
$$12,12$$  

Two sides of a triangle have the following measures. Find the range of possible measure for the third side.
$$9,6$$  

Which of ∠2, ∠4, and ∠6 has the largest measure?

Which of ∠4, ∠5, and ∠1 has the largest measure?

Which of ∠1, ∠7, and ∠2 has the largest measure?

Using the figure, choose the correct symbol to be used.

∠7 _____ ∠2

Using the figure, choose the correct symbol to be used.

∠6 _____ ∠8

Using the figure, choose the correct symbol to be used.

∠4 _____ ∠8