# Geometry

posted by .

I need help on these two.

Consider tirangles ABC and DEF. Side A is congruent to side F. Angle A is congruent to angle F. Angle B is congruent to angle E. What postulate or theorem can be used to prove that the two triangles are congruent?

If angle1 and angle2 are complementary angles, and mangle1 = 5x-9 and mangle2=4x, find the measure of the two angles.

Step by step would be great guys. I need it

Cant you use the ASA theorem? Two triangles are congruent if a pair of corresponding angles and the included side are equal.

if 5x-9 + 4x=90 solve for x.

I completely forgot about the ASA theorem. I don't know why it didn't cross my mind when I read the problem! Thank you. =)

If the m<1=39 degrees and <2 is congruent to <1 does that equal 39 degrees.

## Similar Questions

1. ### Geometry

Can you please explain the Side-Side- Side Postulate, The Side-Angle-Side Postulate, and The Angle-Side-Angle Postulate. Thank you very much The side-side-side postulate is when two triangles are congruent with one another. (all sides …
2. ### Geometry

Can some one please check these for me.Thanks Angle DEF is similar to Angle HJK and the scale factor of angle DEF to anle HJK IS 5/2. If EF =15 FIND JK Here is what I came up with Am I correct 5/2 = EF/JK 5/2 =15/JK 5(JK)=30 JK=30/5 …
3. ### geometry

can one tell if two triangles are congruent if they are given only the angles and all of them are congruent to one another?
4. ### geometry

I have triangle XYZ with BX as the bisector sides XY and XZ are congruent. I have to write a proof for angle Y being congruent to angle Z. This is what I have, but it doesn't seem correct - can anyone help?
5. ### Geometry

Write a two column proof. Given: angle STV is congruent to angle TVU, angle STU is congruent to angle UVS. Prove: Angle SVT is congruent to angle UTV.
6. ### geometry

solve this proof: PR is congruent to DE, PT is congruent to DF, Angle R is congruent to Angle E, Angle T is congruent to Angle F.. Prove Triangle PRT is congruent to Triangle DEF
7. ### Geometric Proofs

Given: line AB is congruent to line AC, Angle BAD is congruent to angle CAD. Prove: line AD bisects BC Picture: An upside down triangle divided inhalf to form two triangles Angle BAD and angle CAD. They share a common side of AD. and …
8. ### Geometry

PQR is congruent to DJE. complete the statement below PR is congruent to __, DJ is congruent to __ angle E is congruent to __ 1) PR is congruent to PQ, DJ is congruent to PQ, angle E is congruent to angle R 2) PR is congruent to DE, …
9. ### Geometry

Write a two column proof. Given: angle STV is congruent to angle TVU, angle STU is congruent to angle UVS. Prove: Angle SVT is congruent to angle UTV.
10. ### Math

1. If Angle ABC is congruent to Angle DEF by side-side-side triangle congruence, the angle B is congruent to Angle E by?

More Similar Questions