The Angle Secant Theorem

A secant is a line that intersects a circle at two points. In the figure below, is formed by two secants. The angle intercepts two arcs and . In this post, we will prove that the measure of the angle formed by two secants intersecting outside a circle is half the difference of the arcs […]
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Math Proof Problem of the Week 1

It’s Friday and as I have mentioned in the previous post, I will be posting proof problems that are accessible to advanced high school students every Friday. Here is the Mathematics Proof Problem of the Week. If , and , prove that . The proof of this problem and the second Math Proof of the […]
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New Series: Math Proof of the Week

I am starting a new series called Math Proof of the Week. This is very similar to Problem of the Week of the many websites on the internet. Each week, I will be giving a challenging mathematical proof problem which is accessible for high school students. The solutions of will be given the following week. […]
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