Acute Obtuse Right & Straight Angles - Complementary and Supplementary Angles

This geometry video tutorial explains the difference between acute angles, right angles, obtuse and straight angles. It also covers complementary and supplementary angles. This video contains plenty of examples and practice problems that involves algebraic calculations.

Geometry Introduction:

Lines, Rays, Line Segments, & Angles:

Acute, Obtuse, Right, & Straight Angles:

Decimal Degrees to DMS Formula:

Clock to Angle Problems:

Angle Bisector Theorem - Midpoints:

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Converse, Inverse, & Contrapositive:

Geometry Probability - Length & Area:

Perpendicular Lines, Rays, & Segments:

Complementary & Supplementary Angles:

Addition & Subtraction Equality Property:

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Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

[Romr.]

Mistake on factoring -189, -7 & 27 not -7 & 20

[Gingerman]

I have watched every geometry video you have made and it helped me so much to learn geometry.

[e-hsmrn]

This was a great video. You did a great job explaining the concepts but you have made a mistake on 9:55 - 13:50.

Angle 1 is an obtuse angle but you answered it as 65 degrees
while Angle 2 is an acute angle but you have answered it to be 115 degrees.

I think you should swap the formulas for angle 1 and 2 so it would make more sense.

Thanks for the video.

[pruthviteja]

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[linentandhacker]

Thank you my grades depended on this video

[beniialmeida]

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[georgesadler]

MR. Organic chemistry Tutor, thank for another incredible video/lecture on Angles in Geometry. Solving problems in Land Surveying helps me with a good understanding and background in Geometry.

[mustafanizar]

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[Bruh-ispz]

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[REDZONE_]

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[rehanplayer]

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[bluebacon]

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[graceallovermae]

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[Macris]

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[yousuf.]

Right angle
Abtuse angle
Acute angle
Straight angle
OH you saved me from the exam thank you for this video dude
Good job and Good luck by bro😘

[neniainopia]

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[WorlanyoAdiko]

this has really helped me understand angles better🤠🤠🤠

[Aayan_editz]

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[brandondiaz]

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[samanthapiet]

On the final problem, when you are factoring and have 7 and -27. You flip the signs and write -7 but put 20 instead of 27. So x should equal 7 and -27. Right?