Completed
Special Right Triangles 30-60-90 & 45-45-90 (3 Easy Methods Explained)
Class Central Classrooms beta
YouTube videos curated by Class Central.
Classroom Contents
Geometry
Automatically move to the next video in the Classroom when playback concludes
- 1 Area of a Segment in a Circle 2 Methods
- 2 Find Equation of Line Perpendicular to a Line Through a Given Point
- 3 Find Area of Regular Polygon Given Apothem
- 4 Special Right Triangles 30-60-90 & 45-45-90 (3 Easy Methods Explained)
- 5 Find the Equation of a Circle Given Endpoints of Diameter
- 6 How to Find Circumcenter Given 3 Vertices (Algebraically)
- 7 Cone Lateral Area, Surface Area and Volume
- 8 Pyramid Lateral Area, Surface Area and Volume
- 9 Prism Lateral Area, Surface Area and Volume
- 10 Cylinder Lateral Area, Surface Area and Volume
- 11 How to Find Orthocenter Given 3 Vertices (Algebraically)
- 12 Interior and Exterior Angles of Polygons (Formulas)
- 13 Lateral Area and Surface Area of Cones, Pyramids, Cylinders & Prisms
- 14 Find the Area of a Regular Polygon Given Apothem, Side, Perimeter, or Radius (4 Examples)
- 15 Incenter, Circumcenter, Centroid, Orthocenter (Properties & Diagrams)
- 16 Rotations (Easier Method) 90 180 270
- 17 Reflect a Point Over a Line (Algebraically)
- 18 2 Column Proof ASA Triangle Congruence
- 19 2 Column Triangle Congruence Proof AAS
- 20 2 Column Triangle Proof SAS
- 21 Rotation about a Point with Protractor
- 22 Geometry Lesson 1 - Points, Lines, and Planes
- 23 Triangle Inequality Theorem Possible Values of x
- 24 Find Areas of Similar Figures Given Perimeters
- 25 Find Area of Regular Polygon Given Side Length
- 26 Find the Area of Regular Polygon Given Radius
- 27 Pythagorean Theorem
- 28 30 60 90 and 45 45 90 Special Right Triangles (Proportion Method)
- 29 Centroid (One Third Two Thirds) Examples
- 30 Biconditional Statement How to Write
- 31 Is a Triangle Right, Acute, or Obtuse Given Sides? (Pythagorean Converse)
- 32 Write the Equation of a Circle in Standard Form Given Center & Radius
- 33 Geometric Probability
- 34 Geometry Final Exam Review
- 35 Hinge Theorem (Geometry)
- 36 Rationalize the Denominator with Radicals (Monomials & Binomials)
- 37 Interior Angle in a Polygon How to Find (Formula)
- 38 Hemisphere Surface Area (Formula)
- 39 Geometry Midterm Exam Giant Review
- 40 Volume of an Oblique Prism - How to Find (Formula)
- 41 Perpendicular Bisector Finding the Equation
- 42 Polygons Finding Number of Sides
- 43 Surface Area and Volume Review (Geometry)
- 44 Finding an Exterior Angle in a Polygon
- 45 Angle Bisector Theorem
- 46 Angle of Elevation and Depression Problems
- 47 Triangle Proportionality Theorem
- 48 How to Find Scale Factor with Similar Figures
- 49 Find Possible Lengths of Third Side in a Triangle
- 50 Triangle Inequality Solve for x
- 51 Properties of Proportions
- 52 Indirect Proof Example
- 53 Midsegment Theorem Triangles (Geometry)
- 54 Triangle Congruence Statement - How to Write (Geometry)
- 55 CPCTC Congruent Triangles Geometry Proof
- 56 Corresponding, Alternate Interior, Alternate Exterior, Consecutive Interior Angles
- 57 Congruent Supplements Theorem Using in a Beginning Geometry Proof
- 58 Beginning Geometry Proof Using Transitive Property
- 59 Beginning Geometry Proof Using Segment Addition Postulate
- 60 Finding Endpoint Given Midpoint
- 61 How to Identify and Calculate Rotational Symmetry
- 62 Composition of Reflections over 2 Intersecting Lines
- 63 Composition of Reflections over 2 Parallel Lines
- 64 What are Adjacent Angles?
- 65 Opposite Rays - What are They?
- 66 Similar Solids Find Volume Given Surface Area
- 67 Locus in Space Examples
- 68 Euler's Theorem
- 69 Area of a Sector of a Circle (Using Proportions)
- 70 Finding Arc Length Using Proportions
- 71 Trapezoid Area Formula with Examples
- 72 Finding Area of Kites and Rhombus
- 73 Ambiguous Case Law of Sines
- 74 Area of a Segment in a Circle
- 75 Properties of Quadrilaterals (Tree Diagram)
- 76 Parallel Lines Cut by a Transversal - Finding Angle Measures
- 77 Converse, Inverse, Contrapositive, Biconditional Statements
- 78 Law of Detachment and Syllogism
- 79 Segment Length Formulas in Circles (Secants, Chords, Tangents)
- 80 Circles, Angle Measures, Inscribed Angles, Intersecting Chords, Secants & Tangents
- 81 Sphere Surface Area and Volume
- 82 Volume of a Cone and Pyramid - How to Find (Formula)
- 83 Surface Area of Cones and Pyramids
- 84 Volumes of Prisms and Cylinders (Formula & Examples)
- 85 Surface Area of Prisms and Cylinders
- 86 Finding Interior and Exterior Angles in a Polygon
- 87 Pythagorean Inequality Theorem - Obtuse, Acute or Right?
- 88 Converse of the Pythagorean Theorem
- 89 Pythagorean Triples
- 90 Midpoint Formula
- 91 Distance Formula - How to Use
- 92 Trigonometry: How to Solve Right Triangles
- 93 Inverse Trig Ratios Solving for Angles
- 94 SOH CAH TOA (Trigonometry)
- 95 Radicals Simplifying
- 96 Constructing a Parallel Line through a Point (Geometry)
- 97 Constructing Perpendicular from Point to Line (Geometry)
- 98 Constructions How to Copy An Angle
- 99 How to Use a Compass
- 100 Angle Bisector How to Construct Using Compass (Geometry)
- 101 Constructions Perpendicular Bisector (Geometry)
- 102 Leg Geometric Mean Theorem
- 103 Altitude Geometric Mean Theorem
- 104 30-60-90 Special Right Triangles
- 105 45-45-90 Special Right Triangles
- 106 Point Along a Directed Segment
