Problem preview
G-SRT.8 Warmup M2-053-A11-V01

Use trig ratios and the Pythagorean Theorem to solve right triangles in applied problems.

Solve navigation with a signed vector, distance, and bearing

Problem

A boat travels \(12~\text{km}\) east and then \(5~\text{km}\) north. Use the Pythagorean theorem for resultant distance and inverse tangent of \(5/12\) for the angle measured north of east; report \(\text{both}~\text{results}\).

Big Picture

What this problem is really about

A navigation result combines vector magnitude with a direction measured from a named axis. We’ll encode east and north as perpendicular components, use the Pythagorean theorem for distance, form north-over-east for the bearing angle, and report the rounded direction with its correct north-of-east wording.

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Four variants of this problem type
Curriculum context
Course
Math II
Standard
G-SRT.8
Category
Geometry
Domain
Similarity, Right Triangles, and Trigonometry
Objective
Use trig ratios and the Pythagorean Theorem to solve right triangles in applied problems.
Problem type
Solve navigation with a signed vector, distance, and bearing