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What’s Next on Geoclid

What’s Next on Geoclid

Looking back to move forward
Go to the profile of Albers Uzila
Albers Uzila
The Origin of the Infamous Law of Cosines

The Origin of the Infamous Law of Cosines

When algebra meets geometry, again
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Albers Uzila
2011 Indonesia Regional Olympiad Problem 4

2011 Indonesia Regional Olympiad Problem 4

Geometry Challenge #12
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Albers Uzila
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Theorems 📖
How to Prove the Law of Sines: a Complete Guide

How to Prove the Law of Sines: a Complete Guide

When algebra meets geometry
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Albers Uzila
What’s so Special about Circumcircles?

What’s so Special about Circumcircles?

Alright, hear me out
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Albers Uzila
From Kite to Parallelogram

From Kite to Parallelogram

They have unique diagonals. Here’s why.
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Albers Uzila
Introducing: The Theorem Grid

Introducing: The Theorem Grid

Theorems on Geoclid So Far
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Albers Uzila
Another Way to Calculate the Area of a Triangle

Another Way to Calculate the Area of a Triangle

Besides the usual formula you learn from school
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Albers Uzila
In Search of Segment Length Inside a Triangle

In Search of Segment Length Inside a Triangle

Stewart’s Theorem: Pythagorean going forward
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Albers Uzila
Pythagorean Theorem

Pythagorean Theorem

and a neat way to prove it
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Albers Uzila
But Why is the Total Internal Angle of a Triangle 180°?

But Why is the Total Internal Angle of a Triangle 180°?

And why is it 540° for a pentagon?
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Albers Uzila
Line, Ray, and Segment

Line, Ray, and Segment

What’s the difference?
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Albers Uzila
5 Special Lines in a Triangle

5 Special Lines in a Triangle

Altitude, median, and the three bisectors
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Albers Uzila
Similarity

Similarity

A piece of fundamental knowledge in solving geometry problems
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Albers Uzila
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