diff --git a/client/src/pages/guide/english/mathematics/intro-to-the-trigonometric-ratios/index.md b/client/src/pages/guide/english/mathematics/intro-to-the-trigonometric-ratios/index.md
index a8b5ce47a0..2a18973e16 100644
--- a/client/src/pages/guide/english/mathematics/intro-to-the-trigonometric-ratios/index.md
+++ b/client/src/pages/guide/english/mathematics/intro-to-the-trigonometric-ratios/index.md
@@ -3,11 +3,9 @@ title: Intro to the Trigonometric Ratios
 ---
 ## Intro to the Trigonometric Ratios
 
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+All of the trigonometric functions of an angle θ can be constructed geometrically in terms of a unit circle centered at O.
 
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-
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+https://en.wikipedia.org/wiki/Trigonometry#/media/File:Circle-trig6.svg
 
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