#GeometryShortcuts
Hourglass bowtie triangles on the SAT? Remember: Area scales with the scale factor SQUARED!

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September 22, 2026 at 10:31 AM
Find the Radius of a Circle from a Chord!
To find the radius of a circle from a chord and its distance from the center:
r = √[(d² + (c/2)²)], where d is the distance from center, and c is the chord length.
Try for c = 8, d = 6!
#GeometryShortcuts
March 29, 2025 at 4:37 AM
Chord Length Trick!
Find the length of a chord using Pythagoras:
Chord = 2 × √(r² - d²). Try for r=10, d=6.
#GeometryShortcuts
March 27, 2025 at 6:48 AM
Find the Radius of a Circle from a Chord!
To find the radius of a circle from a chord and its distance from the center:
r = √[(d² + (c/2)²)], where d is the distance from center, and c is the chord length.
Try for c = 8, d = 6!
#GeometryShortcuts
March 26, 2025 at 12:09 PM
Chord Length Trick!
Find the length of a chord using Pythagoras:
Chord = 2 × √(r² - d²). Try for r=10, d=6.
#GeometryShortcuts
March 25, 2025 at 7:40 AM