Interfaces geometric figure

Interface/InterfaceAllSegments.php

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+<?php
+/**
+ * Created by PhpStorm.
+ * User: mrs
+ * Date: 28.12.2017
+ * Time: 14:00
+ */
+
+interface AllSegments
+{
+    public function getAllSegments(): array;
+
+    public function getAllSegmentsLength(): float;
+}

Interface/InterfacePerimeter.php

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+<?php
+/**
+ * Created by PhpStorm.
+ * User: mrs
+ * Date: 28.12.2017
+ * Time: 11:25
+ */
+
+interface Perimeter
+{
+    public function getPerimeter(): float;
+}

Interface/InterfaceSegmentLength.php

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+<?php
+/**
+ * Created by PhpStorm.
+ * User: mrs
+ * Date: 28.12.2017
+ * Time: 13:44
+ */
+
+interface SegmentLength
+
+{
+    public function getSegmentLength(): float;
+}