Similar Triangles Exercises

Example 1

What is the reason for statement 1?

StatementReason
1. ∠B ≅ ∠K?

Example 2

What is the reason for statement 2?

StatementReason
1. ∠B ≅ ∠KGiven (in figure)
2. ∠BIR ≅ ∠KIC?

Example 3

What is the reason for statement 3?

StatementReason
1. ∠B ≅ ∠KGiven (in figure)
2. ∠BIR ≅ ∠KICVertical angles theorem
3. ∆BRI ~ ∆KCI?

Example 4

What is statement 2?

Given: A, S, and E are the midpoints on their respective sides of ∆BKT.
Prove: ∆BKT ~ ∆ESA

StatementReason
1. A is the midpoint of BK, S is the midpoint of BT, and E is the midpoint of KTGiven
2. Triangle Midsegment Theorem (1)

Example 5

What is the reason for statement 3?

Given: A, S, and E are the midpoints on their respective sides of ∆BKT.
Prove: ∆BKT ~ ∆ESA

StatementReason
1. A is the midpoint of BK, S is the midpoint of BT, and E is the midpoint of KTGiven
2. Triangle Midsegment Theorem (1)
3. ?

Example 6

What is statement 4?

Given: A, S, and E are the midpoints on their respective sides of ∆BKT.
Prove: ∆BKT ~ ∆ESA

StatementReason
1. A is the midpoint of BK, S is the midpoint of BT, and E is the midpoint of KTGiven
2. Triangle Midsegment Theorem (1)
3. Triangle Midsegment Theorem (1)
4. SE = ?Triangle Midsegment Theorem (1)

Example 7

What is the reason for statement 6?

Given: A, S, and E are the midpoints on their respective sides of ∆BKT.
Prove: ∆BKT ~ ∆ESA

StatementReason
1. A is the midpoint of BK, S is the midpoint of BT, and E is the midpoint of KTGiven
2. Triangle Midsegment Theorem (1)
3. Triangle Midsegment Theorem (1)
4. Triangle Midsegment Theorem (1)
5. Statements 2, 3, 4
6. ∆BKT ~ ∆ESA?

Example 8

Using the image below, we want to prove that ∆QET ~ ∆UES. What is the reason for statement 2?

StatementReason
1. QT || USGiven
2. ?

Example 9

Using the image below, we want to prove that ∆QET ~ ∆UES. What is statement 3?

StatementReason
1. QT || USGiven
2. Triangle Proportionality Theorem
3. ?Reflexive Property

Example 10

Using the image below, we want to prove that ∆QET ~ ∆UES. What is the reason for statement 4?

StatementReason
1. QT || USGiven
2. Triangle Proportionality Theorem
3. ∠QET ≅ ∠UESReflexive Property
4. ∆ QET ~ ∆UES?