23.0k views
4 votes
GK∥HJ. Complete the proof that m∠IHK=m∠G+m∠K without using the Triangle Angle Sum Theorem.GKHIJ

GK∥HJ. Complete the proof that m∠IHK=m∠G+m∠K without using the Triangle Angle Sum-example-1
GK∥HJ. Complete the proof that m∠IHK=m∠G+m∠K without using the Triangle Angle Sum-example-1
GK∥HJ. Complete the proof that m∠IHK=m∠G+m∠K without using the Triangle Angle Sum-example-2
GK∥HJ. Complete the proof that m∠IHK=m∠G+m∠K without using the Triangle Angle Sum-example-3
User Anna Gevel
by
6.0k points

1 Answer

5 votes

Explanation

We are given the following:


GK||HJ

We are required to prove that:


m\angle IHK=m\angle G+m\angle K

We already know that:


\begin{gathered} GK||HJ\text{ \textbraceleft Given\textbraceright} \\ \\ \angle G\cong\angle IHJ\text{ \textbraceleft Corresponding Angles Theorem\textbraceright} \end{gathered}

Now, we have:


\angle K\cong\angle JHK\text{ \textbraceleft Alternate Interior Angles Theorem\textbraceright}

Also, we have:


m\angle IHK=m\operatorname{\angle}IHJ+m\operatorname{\angle}JHK\text{ \textbraceleft Additive Property of Angle Measure\textbraceright}

GK∥HJ. Complete the proof that m∠IHK=m∠G+m∠K without using the Triangle Angle Sum-example-1
User Michael Heil
by
6.4k points