51 Answered Questions for the topic Geometry Proofs


If angle one and angle two form a linear pair, and angle two and angle three are supplementary, prove angle one and angle three are congruent

lines are two in a somewhat horizontal parrallel that intersect a vertical angle one is acute and angle two is obtuse


how to mathematically prove that a cube consists of 11 nets?

My math teacher and numerous online websites state that a cube has 11 nets. But none of them give a mathematical proof as to why that is. I believe this statement is not important enough for people... more


Given: AB is congruent to AC, CB is congruent to CD Prove: AB times DB = (CB)^2

ABC is a large triangle. BCD is inside that triangle. Point D is between A and B.


Write a paragraph to prove that the measure of angle 3 is equal to the measure of angle 5.

I don't understand and f i don't answer it ill fail the quiz! Please help, ill do anythiiinnggg!!!!


Write a complete proof for the following.

PICTURE: https://pasteboard.co/GWgMblg.png Given: EC // AB in △ABD Prove: ∠AEC > ∠B


please help i do not know what to do

Write a complete two-column proof for following information:Given: Segment AB = x + 16, Segment BC = 4x + 11 Segment AC = 77Prove: AB = 26


Angle 1 and angle 2 are a linear pair; angle 1 and 3 are vertical angles. Prove angle 2 and angle 3 are a linear pair

I need a answer as soon as possible. Please solve in six steps


Geometry Challenge

<B is a comp. of <A.<C is a supp. of <B. <D is a supp. of <C. <E is a comp. of <D. <F is a comp. of <E. <G is a supp. of <F.   Then <G=_?__


what is the reason of line AO congruent to line CO

Line AO congruent to line CO . what is the reason ?


Given: parallelogram ABCD. Prove: <A=<C and <B=<D

Need help on solving this geometry proof! i am stumped on this question and need help solving it


I have to add two proportions

I was told to add a2=cd and b2=ce what is the sum?


How to prove if a triangle is isosceles.

If you have an isosceles triangle DAE inside another triangle CAB and CD is congruent to EB how do you prove that triangle CAB is isosceles?


For Proofs, how do you notice the different properties of equality?

I know that vertical angles are always congruent, but I dont know when to write something for two congruent triangles that are not with vertical angles.


Write a plan to prove that the midpoins of the sides of a rhombus determine a rectangle using coordinate geometry.

Full Question: The coordinates for a rhombus are given (2a, 0), (0, 2b), (-2a, 0), (0,-2b). Write a plan to prove that the midpoints of the sides of a rhombus determine a rectangle using... more


I do not understand how to do flow/two column/paragraph proofs in geometry.

For example, we are expected to prove that two lines or angles are congruent by postulates. We are also supposed to write a congruence statement AND the parts that make it congruent (3 minimum).... more


I thought that isoceles triangles only have 2 congruent sides, and not any more?

i am learning geometry. i was watching a video and for a proof, they said that isoceles triangles have at least 2 congruent sides


I need help writing geometric proofs and I don't know how.

All the proofs are either you're trying to prove the figure is a parallelogram or that you're trying to prove the angles are congruent or something else. I don't really understand it and I can't... more


Given: line WXY, m<WXZ = 135°. Prove: m<ZXY = 45°

Statements line WXY m<WXY = 180° m<WXZ = 135° m<WXY = m<WXZ + m<ZXY 180° = 135° + m<ZXY 45° = m<ZXY m<ZXY = 45°   Reasons  Given Defintion of supplementary... more


Prove using a paragraph proof.

Statements:  9 = 4x - 3(x - 2)  9 = 4x - 3x + 6  9 = x + 6  3 = x  x = 3   Reasons: Given          Proofs : Fill in the reasons (4) for the statements provided


Given: m ⊥ l, n ⊥ l. Prove m || n

Statements: m ⊥ l, n ⊥ l <1 is a right angle <2 is a right angle <1 =~ <2 m || n    Reasons: Given           Proofs : Fill in the reasons (4) for the statements... more


Given : AB = 8 , AC = 12 , Prove: BC = 4. Give me the statement and reasons.

Geometric Proofs


AB + AB = AC



Given line segment BA is perpendicular to line segment BC then <1 and <2 are complementary prove

If two sides are adjacent acute angles are perpendicular, then the angles are complementary... Given line segment BA is perpendicular to line segment BC then <1 and <2 are complementary prove


Given: BF bisects ?AFC and ?CFD??BFC Prove:?AFB ? ?CFD

 Given: BF bisects ∠AFC and ∠CFD≅∠BFC Prove:∠AFB ≅ ∠CFD  
1 3

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