Calculators · Grade 4
Fraction Calculator
Add, subtract, multiply, and divide fractions. Get a checked answer and a step-by-step explanation.
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Lessons · Grade 10
Angle of Depression: Formula and Examples
Learn the angle of depression formula, explore the interactive diagram, and follow worked building and cliff examples.
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Charts · Kindergarten
Days of the Week: Printable Charts
Learn the seven days in order. Download printable charts and a day-order practice sheet.
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Charts · Kindergarten
Months of the Year: Charts and Quiz
Learn the 12 months in order. Download printable month charts and a practice quiz.
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Lessons · Grade 7
Co-Interior Angles In Simple Terms With Examples
Co-interior angles sit on the inside of parallel lines. They appear after a straight line crosses two parallel lines. Each angle pairs with another angle. These pairs form a special total.…
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Lessons · Grade 7
Adjacent Angles: Definition and Examples
Adjacent Angles Explorer 👉 DRAG the Red and Blue dots left or right to change the angles! Angle A (Red): 45 ° Angle B (Blue): 45 ° Total: 90 ° Definition: Adjacent angles are two angles…
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Lessons · Grade 4
Lines, Line Segments, Rays, and Opposite Rays
Lines Explorer 👉 DRAG the points to move the Line. Notice it goes forever! Line: ↔ AB Length: Infinite (∞) Definition: A line has no endpoints. It extends infinitely in both directions.…
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Lessons · Grade 7
Linear Pairs of Angles: Definition and Examples
Linear Pair Explorer 👉 DRAG the Red Dot left or right. Notice the sum is always 180°! Angle A (Left): 90 ° Angle B (Right): 90 ° Total: 180 ° Definition: A Linear Pair is a pair of adjacent…
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Lessons · Grade 7
90° Clockwise Rotation
90° CLOCKWISE ROTATION 👉 DRAG the Blue Point (A) to rotate it 90° clockwise. A A' Pre-image A : ( 3 , 4 ) Image A' : ( 4 , -3 ) RULE: (x, y) → (y, -x) The Rule: To rotate a point 90°…
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Lessons · Grade 7
90° Counterclockwise Rotation
90° COUNTERCLOCKWISE ROTATION 👉 DRAG the Blue Point (A) to rotate it 90° counterclockwise. A A' Pre-image A : ( 3 , 4 ) Image A' : ( -4 , 3 ) RULE: (x, y) → (-y, x) The Rule: To rotate a…
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Lessons · Grade 6
Theoretical vs Experimental Probability With Example
Introduction Probability helps people predict the chance of events. It also helps them understand how likely an outcome appears. Many daily situations involve an element of chance. Weather…
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Calculators · Grade 10
Degree to Radian and Radian to Degree Converter
A Degree to Radian and Radian to Degree converter can be a helpful tool for students, teachers, and professionals who work with angles and trigonometry on a regular basis. Converting…
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