Free SAT Lines & Angles Mock Test

Even in SAT Lines and Angles, you have to follow some SAT guide - "lines"! Take a quick SAT practice test on Lines & Angles to level up your skills, tackle tougher problems, and discover your strengths.

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Try out these Lines & Angles practice questions

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Ratios and Rates

In the figure below, the lengths of AC, AB and BC are 3, 3 sqrt(3) and 6, respectively. If AC=CD, what is the measure of angle y?

A 30° B 60° C 90° D 120°

An acute angle in a right triangle measures 25° less than the largest angle in the triangle. What is the measure, in degrees, of the smallest angle in the triangle?

A 25 B 65 C 75 D 90

In the figure shown, what is the value of x?

A 65 B 115 C 130 D 245

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How to solve questions from Lines & Angles?

Identify Angle Relationships

Recognize parallel lines cut by transversals, vertical angles, and triangle types for quick angle identification.

Apply Core Properties

Use triangle sum (180°), exterior angle theorem, and supplementary relationships to find missing angles.

Work Step-by-Step

Write givens on diagrams, find one angle at a time using relationships, then use results for next angles.

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Why Lines & Angles matters for SAT?

EdisonOS conducted a detailed Bluebook analysis to help tutors design SAT tests mirroring official Bluebook test challenges. Findings show Geometry & Trigonometry occupies the smallest portion of SAT Math, averaging 5 questions. Lines & Angles shares 3-4 questions making this skill an essential in your study plan

I Need Detailed Analysis

Avoid These Common Mistakes In Lines & Angles!

Angle Relationship Confusion

Students mix up corresponding vs alternate interior angles with parallel lines, or forget same-side interior angles are supplementary.

Triangle Type Misidentification

Students assume isosceles triangles are equilateral, or forget that exterior angles equal the sum of remote interior angles.

Vertical vs Supplementary Mix-ups

Students confuse when angles are vertical (equal) versus supplementary (add to 180°) at line intersections.

Diagram Information Neglect

Students rush through complex diagrams without marking given angles or writing relationships directly on the figure.

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