**Problem** Find the hypotenuse of a right triangle that has sides of 15' and 20'. | |

**Procedure** | |

Determine the correct equation. | c = Öa^{2} + b^{2} |

Substitute the given values. | c = Ö15^{2} + 20^{2} |

Complete the calculations. | c = Ö225 + 400 c = Ö625 c = 25 |

**Solution** The hypotenuse of a right triangle that has sides of 15' and 20' is 25' | |